21100566072070 has 32 divisors (see below), whose sum is σ = 38034855226368. Its totient is φ = 8428263785568.

The previous prime is 21100566071999. The next prime is 21100566072097. The reversal of 21100566072070 is 7027066500112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237299239 + ... + 237388141.

It is an arithmetic number, because the mean of its divisors is an integer number (1188589225824).

Almost surely, 2^{21100566072070} is an apocalyptic number.

21100566072070 is a deficient number, since it is larger than the sum of its proper divisors (16934289154298).

21100566072070 is a wasteful number, since it uses less digits than its factorization.

21100566072070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122284.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 21100566072070 in words is "twenty-one trillion, one hundred billion, five hundred sixty-six million, seventy-two thousand, seventy".