13112000021 has 4 divisors (see below), whose sum is σ = 13146235392. Its totient is φ = 13077764652.

The previous prime is 13112000017. The next prime is 13112000029. The reversal of 13112000021 is 12000021131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13112000021 - 2² = 13112000017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13111999966 and 13112000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13112000029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17117111 + ... + 17117876.

It is an arithmetic number, because the mean of its divisors is an integer number (3286558848).

Almost surely, 2^13112000021 is an apocalyptic number.

It is an amenable number.

13112000021 is a deficient number, since it is larger than the sum of its proper divisors (34235371).

13112000021 is an equidigital number, since it uses as much as digits as its factorization.

13112000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34235370.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 13112000021 its reverse (12000021131), we get a palindrome (25112021152).

It can be divided in two parts, 131 and 12000021, that multiplied together give a palindrome (1572002751).

The spelling of 13112000021 in words is "thirteen billion, one hundred twelve million, twenty-one", and thus it is an aban number.