13111212200021 has 16 divisors (see below), whose sum is σ = 14165960480448. Its totient is φ = 12063081254400.

The previous prime is 13111212199999. The next prime is 13111212200029. The reversal of 13111212200021 is 12000221211131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 13111212200021 - 2²² = 13111208005717 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 (13111212200029) 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, 16949861 + ... + 17706501.

It is an arithmetic number, because the mean of its divisors is an integer number (885372530028).

Almost surely, 2^{13111212200021} is an apocalyptic number.

It is an amenable number.

13111212200021 is a deficient number, since it is larger than the sum of its proper divisors (1054748280427).

13111212200021 is a wasteful number, since it uses less digits than its factorization.

13111212200021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761012.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 13111212200021 its reverse (12000221211131), we get a palindrome (25111433411152).

The spelling of 13111212200021 in words is "thirteen trillion, one hundred eleven billion, two hundred twelve million, two hundred thousand, twenty-one".