121864402 has 16 divisors (see below), whose sum is σ = 199584000. Its totient is φ = 55345840.

The previous prime is 121864367. The next prime is 121864459. The reversal of 121864402 is 204468121.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 49599 + ... + 51997.

It is an arithmetic number, because the mean of its divisors is an integer number (12474000).

Almost surely, 2^121864402 is an apocalyptic number.

121864402 is a deficient number, since it is larger than the sum of its proper divisors (77719598).

121864402 is a wasteful number, since it uses less digits than its factorization.

121864402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 121864402 is about 11039.2210775942. The cubic root of 121864402 is about 495.7837490578.

The spelling of 121864402 in words is "one hundred twenty-one million, eight hundred sixty-four thousand, four hundred two".