31124013123 has 16 divisors (see below), whose sum is σ = 47433520640. Its totient is φ = 17782730496.

The previous prime is 31124013079. The next prime is 31124013131. The reversal of 31124013123 is 32131042113.

It is not a de Polignac number, because 31124013123 - 2¹⁰ = 31124012099 is a prime.

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

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31124013123.

It is not an unprimeable number, because it can be changed into a prime (31124013133) 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, 63411 + ... + 257427.

It is an arithmetic number, because the mean of its divisors is an integer number (2964595040).

Almost surely, 2^31124013123 is an apocalyptic number.

31124013123 is a deficient number, since it is larger than the sum of its proper divisors (16309507517).

31124013123 is a wasteful number, since it uses less digits than its factorization.

31124013123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201666.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31124013123 its reverse (32131042113), we get a palindrome (63255055236).

The spelling of 31124013123 in words is "thirty-one billion, one hundred twenty-four million, thirteen thousand, one hundred twenty-three".