13121042124 has 24 divisors (see below), whose sum is σ = 30619068480. Its totient is φ = 4373208784.

The previous prime is 13121042117. The next prime is 13121042147. The reversal of 13121042124 is 42124012131.

It is a self number, because there is not a number n which added to its sum of digits gives 13121042124.

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, 67747 + ... + 175589.

It is an arithmetic number, because the mean of its divisors is an integer number (1275794520).

Almost surely, 2^13121042124 is an apocalyptic number.

It is an amenable number.

13121042124 is an abundant number, since it is smaller than the sum of its proper divisors (17498026356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121042124 is a wasteful number, since it uses less digits than its factorization.

13121042124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117989 (or 117987 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 13121042124 its reverse (42124012131), we get a palindrome (55245054255).

The spelling of 13121042124 in words is "thirteen billion, one hundred twenty-one million, forty-two thousand, one hundred twenty-four".