2131301312321 has 2 divisors, whose sum is σ = 2131301312322. Its totient is φ = 2131301312320.

The previous prime is 2131301312311. The next prime is 2131301312369. The reversal of 2131301312321 is 1232131031312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2099858929921 + 31442382400 = 1449089^2 + 177320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131301312321 - 2²⁶ = 2131234203457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2131301312311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065650656160 + 1065650656161.

It is an arithmetic number, because the mean of its divisors is an integer number (1065650656161).

Almost surely, 2^{2131301312321} is an apocalyptic number.

It is an amenable number.

2131301312321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131301312321 is an equidigital number, since it uses as much as digits as its factorization.

2131301312321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 2131301312321 its reverse (1232131031312), we get a palindrome (3363432343633).

The spelling of 2131301312321 in words is "two trillion, one hundred thirty-one billion, three hundred one million, three hundred twelve thousand, three hundred twenty-one".