21214565620610 has 32 divisors (see below), whose sum is σ = 38437983216000. Its totient is φ = 8430011504640.

The previous prime is 21214565620609. The next prime is 21214565620621. The reversal of 21214565620610 is 1602656541212.

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 15 ways as a sum of consecutive naturals, for example, 7040000 + ... + 9591179.

It is an arithmetic number, because the mean of its divisors is an integer number (1201186975500).

Almost surely, 2^{21214565620610} is an apocalyptic number.

21214565620610 is a deficient number, since it is larger than the sum of its proper divisors (17223417595390).

21214565620610 is a wasteful number, since it uses less digits than its factorization.

21214565620610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16632026.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 21214565620610 in words is "twenty-one trillion, two hundred fourteen billion, five hundred sixty-five million, six hundred twenty thousand, six hundred ten".