1231342431321 has 16 divisors (see below), whose sum is σ = 1711530597888. Its totient is φ = 786548976000.

The previous prime is 1231342431301. The next prime is 1231342431323.

1231342431321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 1231342431321 - 2²⁷ = 1231208213593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1231342431323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65536356 + ... + 65555141.

It is an arithmetic number, because the mean of its divisors is an integer number (106970662368).

Almost surely, 2^{1231342431321} is an apocalyptic number.

It is an amenable number.

1231342431321 is a deficient number, since it is larger than the sum of its proper divisors (480188166567).

1231342431321 is a wasteful number, since it uses less digits than its factorization.

1231342431321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131091632.

The product of its digits is 10368, while the sum is 30.

The spelling of 1231342431321 in words is "one trillion, two hundred thirty-one billion, three hundred forty-two million, four hundred thirty-one thousand, three hundred twenty-one".