21260612210 has 32 divisors (see below), whose sum is σ = 40335926400. Its totient is φ = 8046120960.

The previous prime is 21260612203. The next prime is 21260612239. The reversal of 21260612210 is 1221606212.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 73355 + ... + 218865.

It is an arithmetic number, because the mean of its divisors is an integer number (1260497700).

Almost surely, 2^21260612210 is an apocalyptic number.

21260612210 is a deficient number, since it is larger than the sum of its proper divisors (19075314190).

21260612210 is a wasteful number, since it uses less digits than its factorization.

21260612210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146306.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 21260612210 in words is "twenty-one billion, two hundred sixty million, six hundred twelve thousand, two hundred ten".