21116620000005 has 32 divisors (see below), whose sum is σ = 34956418527360. Its totient is φ = 10872361194240.

The previous prime is 21116619999961. The next prime is 21116620000031. The reversal of 21116620000005 is 50000002661112.

It is not a de Polignac number, because 21116620000005 - 2²⁰ = 21116618951429 is a prime.

It is a super-2 number, since 2×21116620000005² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21116620000005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120111 + ... + 6499820.

It is an arithmetic number, because the mean of its divisors is an integer number (1092388078980).

Almost surely, 2^{21116620000005} is an apocalyptic number.

It is an amenable number.

21116620000005 is a deficient number, since it is larger than the sum of its proper divisors (13839798527355).

21116620000005 is a wasteful number, since it uses less digits than its factorization.

21116620000005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6627301.

The product of its (nonzero) digits is 720, while the sum is 24.

Adding to 21116620000005 its reverse (50000002661112), we get a palindrome (71116622661117).

The spelling of 21116620000005 in words is "twenty-one trillion, one hundred sixteen billion, six hundred twenty million, five", and thus it is an aban number.