13111200021 has 16 divisors (see below), whose sum is σ = 18406942400. Its totient is φ = 8278391808.

The previous prime is 13111200013. The next prime is 13111200029. The reversal of 13111200021 is 12000211131.

It is an interprime number because it is at equal distance from previous prime (13111200013) and next prime (13111200029).

It is not a de Polignac number, because 13111200021 - 2³ = 13111200013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111200029) 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, 180405 + ... + 242421.

It is an arithmetic number, because the mean of its divisors is an integer number (1150433900).

Almost surely, 2^13111200021 is an apocalyptic number.

It is an amenable number.

13111200021 is a deficient number, since it is larger than the sum of its proper divisors (5295742379).

13111200021 is a wasteful number, since it uses less digits than its factorization.

13111200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65748.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 13111200021 its reverse (12000211131), we get a palindrome (25111411152).

The spelling of 13111200021 in words is "thirteen billion, one hundred eleven million, two hundred thousand, twenty-one".