20121640088831 has 2 divisors, whose sum is σ = 20121640088832. Its totient is φ = 20121640088830.

The previous prime is 20121640088827. The next prime is 20121640088903. The reversal of 20121640088831 is 13888004612102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20121640088831 - 2² = 20121640088827 is a prime.

It is a super-2 number, since 2×20121640088831² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121640078831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060820044415 + 10060820044416.

It is an arithmetic number, because the mean of its divisors is an integer number (10060820044416).

Almost surely, 2^{20121640088831} is an apocalyptic number.

20121640088831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121640088831 is an equidigital number, since it uses as much as digits as its factorization.

20121640088831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 44.

The spelling of 20121640088831 in words is "twenty trillion, one hundred twenty-one billion, six hundred forty million, eighty-eight thousand, eight hundred thirty-one".