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121816020 = 22352030267
BaseRepresentation
bin1110100001011…
…00001111010100
322111012220011110
413100230033110
5222141103040
620030535020
73006263514
oct720541724
9274186143
10121816020
11628421a7
1234967470
131c3116b1
141226d844
15aa63980
hex742c3d4

121816020 has 24 divisors (see below), whose sum is σ = 341085024. Its totient is φ = 32484256.

The previous prime is 121815989. The next prime is 121816039. The reversal of 121816020 is 20618121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1015074 + ... + 1015193.

It is an arithmetic number, because the mean of its divisors is an integer number (14211876).

Almost surely, 2121816020 is an apocalyptic number.

121816020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121816020 is an abundant number, since it is smaller than the sum of its proper divisors (219269004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121816020 is a wasteful number, since it uses less digits than its factorization.

121816020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2030279 (or 2030277 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 121816020 is about 11037.0294916703. The cubic root of 121816020 is about 495.7181291719.

The spelling of 121816020 in words is "one hundred twenty-one million, eight hundred sixteen thousand, twenty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 2030267 4060534 6090801 8121068 10151335 12181602 20302670 24363204 30454005 40605340 60908010 121816020