1231313211031 has 8 divisors (see below), whose sum is σ = 1271505756800. Its totient is φ = 1191150213120.

The previous prime is 1231313210957. The next prime is 1231313211043. The reversal of 1231313211031 is 1301123131321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231313211031 - 2¹⁹ = 1231312686743 is a prime.

It is a super-2 number, since 2×1231313211031² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231313210993 and 1231313211011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231313211091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7302246 + ... + 7468963.

It is an arithmetic number, because the mean of its divisors is an integer number (158938219600).

Almost surely, 2^{1231313211031} is an apocalyptic number.

1231313211031 is a deficient number, since it is larger than the sum of its proper divisors (40192545769).

1231313211031 is a wasteful number, since it uses less digits than its factorization.

1231313211031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14773929.

The product of its (nonzero) digits is 324, while the sum is 22.

Adding to 1231313211031 its reverse (1301123131321), we get a palindrome (2532436342352).

The spelling of 1231313211031 in words is "one trillion, two hundred thirty-one billion, three hundred thirteen million, two hundred eleven thousand, thirty-one".