2131323301321 has 4 divisors (see below), whose sum is σ = 2136134415312. Its totient is φ = 2126512187332.

The previous prime is 2131323301271. The next prime is 2131323301357. The reversal of 2131323301321 is 1231033231312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2131323301321 - 2²¹ = 2131321204169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131323304321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2405556331 + ... + 2405557216.

It is an arithmetic number, because the mean of its divisors is an integer number (534033603828).

Almost surely, 2^{2131323301321} is an apocalyptic number.

It is an amenable number.

2131323301321 is a deficient number, since it is larger than the sum of its proper divisors (4811113991).

2131323301321 is an equidigital number, since it uses as much as digits as its factorization.

2131323301321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811113990.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 2131323301321 its reverse (1231033231312), we get a palindrome (3362356532633).

The spelling of 2131323301321 in words is "two trillion, one hundred thirty-one billion, three hundred twenty-three million, three hundred one thousand, three hundred twenty-one".