1231013190331 has 4 divisors (see below), whose sum is σ = 1231075612512. Its totient is φ = 1230950768152.

The previous prime is 1231013190301. The next prime is 1231013190349. The reversal of 1231013190331 is 1330913101321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1231013190331 - 2⁷ = 1231013190203 is a prime.

It is a super-2 number, since 2×1231013190331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231013190331.

It is not an unprimeable number, because it can be changed into a prime (1231013190301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31181500 + ... + 31220953.

It is an arithmetic number, because the mean of its divisors is an integer number (307768903128).

Almost surely, 2^{1231013190331} is an apocalyptic number.

1231013190331 is a deficient number, since it is larger than the sum of its proper divisors (62422181).

1231013190331 is an equidigital number, since it uses as much as digits as its factorization.

1231013190331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62422180.

The product of its (nonzero) digits is 1458, while the sum is 28.

Adding to 1231013190331 its reverse (1330913101321), we get a palindrome (2561926291652).

The spelling of 1231013190331 in words is "one trillion, two hundred thirty-one billion, thirteen million, one hundred ninety thousand, three hundred thirty-one".