102402120204 has 36 divisors (see below), whose sum is σ = 263237094120. Its totient is φ = 33555496320.

The previous prime is 102402120203. The next prime is 102402120221. The reversal of 102402120204 is 402021204201.

102402120204 is a `hidden beast` number, since 10 + 240 + 212 + 0 + 204 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (102402120203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24103837 + ... + 24108084.

Almost surely, 2^102402120204 is an apocalyptic number.

It is an amenable number.

102402120204 is an abundant number, since it is smaller than the sum of its proper divisors (160834973916).

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

102402120204 is a wasteful number, since it uses less digits than its factorization.

102402120204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48211990 (or 48211985 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 102402120204 its reverse (402021204201), we get a palindrome (504423324405).

The spelling of 102402120204 in words is "one hundred two billion, four hundred two million, one hundred twenty thousand, two hundred four".