21060672052217 has 32 divisors (see below), whose sum is σ = 24263347046400. Its totient is φ = 17907130994688.

The previous prime is 21060672052187. The next prime is 21060672052237. The reversal of 21060672052217 is 71225027606012.

It is a cyclic number.

It is not a de Polignac number, because 21060672052217 - 2⁸ = 21060672051961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21060672052237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1787978834 + ... + 1787990612.

It is an arithmetic number, because the mean of its divisors is an integer number (758229595200).

Almost surely, 2^{21060672052217} is an apocalyptic number.

It is an amenable number.

21060672052217 is a deficient number, since it is larger than the sum of its proper divisors (3202674994183).

21060672052217 is a wasteful number, since it uses less digits than its factorization.

21060672052217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16085.

The product of its (nonzero) digits is 141120, while the sum is 41.

Adding to 21060672052217 its reverse (71225027606012), we get a palindrome (92285699658229).

The spelling of 21060672052217 in words is "twenty-one trillion, sixty billion, six hundred seventy-two million, fifty-two thousand, two hundred seventeen".