21325112565210 has 24 divisors (see below), whose sum is σ = 55445292669780. Its totient is φ = 5686696684032.

The previous prime is 21325112565131. The next prime is 21325112565221. The reversal of 21325112565210 is 1256521152312.

21325112565210 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 5 + 1 + 125 + 6 + 521 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 21301261778241 + 23850786969 = 4615329^2 + 154437^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118472847495 + ... + 118472847674.

Almost surely, 2^{21325112565210} is an apocalyptic number.

21325112565210 is an abundant number, since it is smaller than the sum of its proper divisors (34120180104570).

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

21325112565210 is a wasteful number, since it uses less digits than its factorization.

21325112565210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236945695182 (or 236945695179 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The spelling of 21325112565210 in words is "twenty-one trillion, three hundred twenty-five billion, one hundred twelve million, five hundred sixty-five thousand, two hundred ten".