| Base | Representation |
|---|---|
| bin | 100110110001110… |
| … | …1110110000111100 |
| 3 | 10100200110102121012 |
| 4 | 1031203232300330 |
| 5 | 10131102242340 |
| 6 | 333041254352 |
| 7 | 44150056430 |
| oct | 11543566074 |
| 9 | 3320412535 |
| 10 | 1301212220 |
| 11 | 608556000 |
| 12 | 3039343b8 |
| 13 | 179770979 |
| 14 | c4b589c0 |
| 15 | 7937e565 |
| hex | 4d8eec3c |
1301212220 has 96 divisors (see below), whose sum is σ = 3435457536. Its totient is φ = 405514560.
The previous prime is 1301212219. The next prime is 1301212229. The reversal of 1301212220 is 222121031.
It is a happy number.
It is a Harshad number since it is a multiple of its sum of digits (14).
It is a junction number, because it is equal to n+sod(n) for n = 1301212195 and 1301212204.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1301212229) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 182849 + ... + 189831.
It is an arithmetic number, because the mean of its divisors is an integer number (35786016).
Almost surely, 21301212220 is an apocalyptic number.
1301212220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 1301212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1717728768).
1301212220 is an abundant number, since it is smaller than the sum of its proper divisors (2134245316).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1301212220 is a wasteful number, since it uses less digits than its factorization.
1301212220 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7032 (or 7008 counting only the distinct ones).
The product of its (nonzero) digits is 48, while the sum is 14.
The square root of 1301212220 is about 36072.3193044196. The cubic root of 1301212220 is about 1091.7320105659.
Adding to 1301212220 its reverse (222121031), we get a palindrome (1523333251).
The spelling of 1301212220 in words is "one billion, three hundred one million, two hundred twelve thousand, two hundred twenty".
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