2131323100321 has 2 divisors, whose sum is σ = 2131323100322. Its totient is φ = 2131323100320.

The previous prime is 2131323100307. The next prime is 2131323100327. The reversal of 2131323100321 is 1230013231312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1848618210321 + 282704890000 = 1359639^2 + 531700^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131323100321 - 2²⁷ = 2131188882593 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2131323100292 and 2131323100301.

It is not a weakly prime, because it can be changed into another prime (2131323100327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065661550160 + 1065661550161.

It is an arithmetic number, because the mean of its divisors is an integer number (1065661550161).

Almost surely, 2^{2131323100321} is an apocalyptic number.

It is an amenable number.

2131323100321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131323100321 is an equidigital number, since it uses as much as digits as its factorization.

2131323100321 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 22.

Adding to 2131323100321 its reverse (1230013231312), we get a palindrome (3361336331633).

The spelling of 2131323100321 in words is "two trillion, one hundred thirty-one billion, three hundred twenty-three million, one hundred thousand, three hundred twenty-one".