31230231123 has 96 divisors (see below), whose sum is σ = 54734579712. Its totient is φ = 15455232000.

The previous prime is 31230231103. The next prime is 31230231127. The reversal of 31230231123 is 32113203213.

It is not a de Polignac number, because 31230231123 - 2¹⁶ = 31230165587 is a prime.

It is a super-2 number, since 2×31230231123² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31230231123.

It is not an unprimeable number, because it can be changed into a prime (31230231127) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26002923 + ... + 26004123.

It is an arithmetic number, because the mean of its divisors is an integer number (570151872).

Almost surely, 2^31230231123 is an apocalyptic number.

31230231123 is a deficient number, since it is larger than the sum of its proper divisors (23504348589).

31230231123 is a wasteful number, since it uses less digits than its factorization.

31230231123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685 (or 1672 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31230231123 its reverse (32113203213), we get a palindrome (63343434336).

The spelling of 31230231123 in words is "thirty-one billion, two hundred thirty million, two hundred thirty-one thousand, one hundred twenty-three".