121656402 has 48 divisors (see below), whose sum is σ = 302258112. Its totient is φ = 34642080.

The previous prime is 121656401. The next prime is 121656413. The reversal of 121656402 is 204656121.

121656402 is a `hidden beast` number, since 1 + 2 + 1 + 656 + 4 + 0 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (121656401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40248 + ... + 43164.

It is an arithmetic number, because the mean of its divisors is an integer number (6297044).

Almost surely, 2^121656402 is an apocalyptic number.

121656402 is an abundant number, since it is smaller than the sum of its proper divisors (180601710).

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

121656402 is a wasteful number, since it uses less digits than its factorization.

121656402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263 (or 3260 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 121656402 is about 11029.7960996566. The cubic root of 121656402 is about 495.5015180304.

The spelling of 121656402 in words is "one hundred twenty-one million, six hundred fifty-six thousand, four hundred two".