20311330332131 has 2 divisors, whose sum is σ = 20311330332132. Its totient is φ = 20311330332130.

The previous prime is 20311330332121. The next prime is 20311330332263. The reversal of 20311330332131 is 13123303311302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20311330332131 - 2²⁶ = 20311263223267 is a prime.

It is a super-2 number, since 2×20311330332131² (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 20311330332131.

It is not a weakly prime, because it can be changed into another prime (20311330332121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10155665166065 + 10155665166066.

It is an arithmetic number, because the mean of its divisors is an integer number (10155665166066).

Almost surely, 2^{20311330332131} is an apocalyptic number.

20311330332131 is a deficient number, since it is larger than the sum of its proper divisors (1).

20311330332131 is an equidigital number, since it uses as much as digits as its factorization.

20311330332131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 26.

Adding to 20311330332131 its reverse (13123303311302), we get a palindrome (33434633643433).

The spelling of 20311330332131 in words is "twenty trillion, three hundred eleven billion, three hundred thirty million, three hundred thirty-two thousand, one hundred thirty-one".