21560736117131 has 2 divisors, whose sum is σ = 21560736117132. Its totient is φ = 21560736117130.

The previous prime is 21560736117127. The next prime is 21560736117169. The reversal of 21560736117131 is 13171163706512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21560736117131 - 2² = 21560736117127 is a prime.

It is a super-4 number, since 4×21560736117131⁴ (a number of 54 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (21560736117101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10780368058565 + 10780368058566.

It is an arithmetic number, because the mean of its divisors is an integer number (10780368058566).

Almost surely, 2^{21560736117131} is an apocalyptic number.

21560736117131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21560736117131 is an equidigital number, since it uses as much as digits as its factorization.

21560736117131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 44.

The spelling of 21560736117131 in words is "twenty-one trillion, five hundred sixty billion, seven hundred thirty-six million, one hundred seventeen thousand, one hundred thirty-one".