1231112133231 has 8 divisors (see below), whose sum is σ = 1662261108480. Its totient is φ = 810352290072.

The previous prime is 1231112133203. The next prime is 1231112133269. The reversal of 1231112133231 is 1323312111321.

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

It is not a de Polignac number, because 1231112133231 - 2¹⁰ = 1231112132207 is a prime.

It is a super-2 number, since 2×1231112133231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231112133271) 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, 2597282745 + ... + 2597283218.

It is an arithmetic number, because the mean of its divisors is an integer number (207782638560).

Almost surely, 2^{1231112133231} is an apocalyptic number.

1231112133231 is a deficient number, since it is larger than the sum of its proper divisors (431148975249).

1231112133231 is an equidigital number, since it uses as much as digits as its factorization.

1231112133231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5194566045.

The product of its digits is 648, while the sum is 24.

Adding to 1231112133231 its reverse (1323312111321), we get a palindrome (2554424244552).

The spelling of 1231112133231 in words is "one trillion, two hundred thirty-one billion, one hundred twelve million, one hundred thirty-three thousand, two hundred thirty-one".