121913902 has 32 divisors (see below), whose sum is σ = 212012640. Its totient is φ = 51962880.

The previous prime is 121913893. The next prime is 121913903. The reversal of 121913902 is 209319121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121913903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152568 + ... + 153364.

It is an arithmetic number, because the mean of its divisors is an integer number (6625395).

Almost surely, 2^121913902 is an apocalyptic number.

121913902 is a deficient number, since it is larger than the sum of its proper divisors (90098738).

121913902 is a wasteful number, since it uses less digits than its factorization.

121913902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 121913902 is about 11041.4628559806. The cubic root of 121913902 is about 495.8508673004.

The spelling of 121913902 in words is "one hundred twenty-one million, nine hundred thirteen thousand, nine hundred two".