121956136 has 64 divisors (see below), whose sum is σ = 253080000. Its totient is φ = 54867456.

The previous prime is 121956103. The next prime is 121956151. The reversal of 121956136 is 631659121.

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 15 ways as a sum of consecutive naturals, for example, 321595 + ... + 321973.

It is an arithmetic number, because the mean of its divisors is an integer number (3954375).

Almost surely, 2^121956136 is an apocalyptic number.

It is an amenable number.

121956136 is an abundant number, since it is smaller than the sum of its proper divisors (131123864).

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

121956136 is a wasteful number, since it uses less digits than its factorization.

121956136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 502 counting only the distinct ones).

The product of its digits is 9720, while the sum is 34.

The square root of 121956136 is about 11043.3752086941. The cubic root of 121956136 is about 495.9081190369.

The spelling of 121956136 in words is "one hundred twenty-one million, nine hundred fifty-six thousand, one hundred thirty-six".