21252615504102 has 24 divisors (see below), whose sum is σ = 46378609378920. Its totient is φ = 7033239662400.

The previous prime is 21252615504053. The next prime is 21252615504103. The reversal of 21252615504102 is 20140551625212.

21252615504102 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 2 + 61 + 550 + 41 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21252615504103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4247122899 + ... + 4247127902.

It is an arithmetic number, because the mean of its divisors is an integer number (1932442057455).

Almost surely, 2^{21252615504102} is an apocalyptic number.

21252615504102 is an abundant number, since it is smaller than the sum of its proper divisors (25125993874818).

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

21252615504102 is a wasteful number, since it uses less digits than its factorization.

21252615504102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8494250948 (or 8494250945 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 36.

The spelling of 21252615504102 in words is "twenty-one trillion, two hundred fifty-two billion, six hundred fifteen million, five hundred four thousand, one hundred two".