31223011124 has 24 divisors (see below), whose sum is σ = 57084085800. Its totient is φ = 14923932800.

The previous prime is 31223011111. The next prime is 31223011133. The reversal of 31223011124 is 42111032213.

It can be written as a sum of positive squares in 4 ways, for example, as 12031896100 + 19191115024 = 109690^2 + 138532^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31223011096 and 31223011105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1320779 + ... + 1344210.

It is an arithmetic number, because the mean of its divisors is an integer number (2378503575).

Almost surely, 2^31223011124 is an apocalyptic number.

It is an amenable number.

31223011124 is a deficient number, since it is larger than the sum of its proper divisors (25861074676).

31223011124 is a wasteful number, since it uses less digits than its factorization.

31223011124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2665123 (or 2665121 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31223011124 its reverse (42111032213), we get a palindrome (73334043337).

The spelling of 31223011124 in words is "thirty-one billion, two hundred twenty-three million, eleven thousand, one hundred twenty-four".