13111220124 has 72 divisors (see below), whose sum is σ = 33431029632. Its totient is φ = 4332494880.

The previous prime is 13111220033. The next prime is 13111220141. The reversal of 13111220124 is 42102211131.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13111220097 and 13111220106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1994467 + ... + 2001029.

It is an arithmetic number, because the mean of its divisors is an integer number (464319856).

Almost surely, 2^13111220124 is an apocalyptic number.

It is an amenable number.

13111220124 is an abundant number, since it is smaller than the sum of its proper divisors (20319809508).

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

13111220124 is a wasteful number, since it uses less digits than its factorization.

13111220124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7047 (or 7042 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 13111220124 its reverse (42102211131), we get a palindrome (55213431255).

The spelling of 13111220124 in words is "thirteen billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-four".