2131302119981 has 2 divisors, whose sum is σ = 2131302119982. Its totient is φ = 2131302119980.

The previous prime is 2131302119971. The next prime is 2131302119987. The reversal of 2131302119981 is 1899112031312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1686491822500 + 444810297481 = 1298650^2 + 666941^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131302119981 - 2¹⁴ = 2131302103597 is a prime.

It is a super-2 number, since 2×2131302119981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131302119987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065651059990 + 1065651059991.

It is an arithmetic number, because the mean of its divisors is an integer number (1065651059991).

Almost surely, 2^{2131302119981} is an apocalyptic number.

It is an amenable number.

2131302119981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131302119981 is an equidigital number, since it uses as much as digits as its factorization.

2131302119981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 2131302119981 in words is "two trillion, one hundred thirty-one billion, three hundred two million, one hundred nineteen thousand, nine hundred eighty-one".