1231311133323 has 16 divisors (see below), whose sum is σ = 1873466390560. Its totient is φ = 798688302048.

The previous prime is 1231311133309. The next prime is 1231311133331. The reversal of 1231311133323 is 3233311131321.

1231311133323 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 311 + 13 + 332 + 3 = 666.

It is not a de Polignac number, because 1231311133323 - 2¹⁴ = 1231311116939 is a prime.

It is a super-2 number, since 2×1231311133323² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1231311133333) 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, 616270840 + ... + 616272837.

It is an arithmetic number, because the mean of its divisors is an integer number (117091649410).

Almost surely, 2^{1231311133323} is an apocalyptic number.

1231311133323 is a deficient number, since it is larger than the sum of its proper divisors (642155257237).

1231311133323 is a wasteful number, since it uses less digits than its factorization.

1231311133323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232543723 (or 1232543717 counting only the distinct ones).

The product of its digits is 2916, while the sum is 27.

Adding to 1231311133323 its reverse (3233311131321), we get a palindrome (4464622264644).

The spelling of 1231311133323 in words is "one trillion, two hundred thirty-one billion, three hundred eleven million, one hundred thirty-three thousand, three hundred twenty-three".