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121115223 = 3329154681
BaseRepresentation
bin1110011100000…
…01001001010111
322102220021212000
413032001021113
5222001141343
620003530343
73000314415
oct716011127
9272807760
10121115223
1162403729
12346899b3
131c127718
141212a2b5
15a975ed3
hex7381257

121115223 has 16 divisors (see below), whose sum is σ = 185618400. Its totient is φ = 77958720.

The previous prime is 121115221. The next prime is 121115231. The reversal of 121115223 is 322511121.

It is not a de Polignac number, because 121115223 - 21 = 121115221 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121115196 and 121115205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121115221) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 76558 + ... + 78123.

It is an arithmetic number, because the mean of its divisors is an integer number (11601150).

Almost surely, 2121115223 is an apocalyptic number.

121115223 is a deficient number, since it is larger than the sum of its proper divisors (64503177).

121115223 is a wasteful number, since it uses less digits than its factorization.

121115223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154719 (or 154713 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 121115223 is about 11005.2361628454. The cubic root of 121115223 is about 494.7656925979.

Adding to 121115223 its reverse (322511121), we get a palindrome (443626344).

The spelling of 121115223 in words is "one hundred twenty-one million, one hundred fifteen thousand, two hundred twenty-three".

Divisors: 1 3 9 27 29 87 261 783 154681 464043 1392129 4176387 4485749 13457247 40371741 121115223