111213200121 has 32 divisors (see below), whose sum is σ = 156424120320. Its totient is φ = 70144424064.

The previous prime is 111213200101. The next prime is 111213200149. The reversal of 111213200121 is 121002312111.

It is not a de Polignac number, because 111213200121 - 2²⁹ = 110676329209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111213200121.

It is not an unprimeable number, because it can be changed into a prime (111213200101) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6095805 + ... + 6114021.

It is an arithmetic number, because the mean of its divisors is an integer number (4888253760).

Almost surely, 2^111213200121 is an apocalyptic number.

It is an amenable number.

111213200121 is a deficient number, since it is larger than the sum of its proper divisors (45210920199).

111213200121 is a wasteful number, since it uses less digits than its factorization.

111213200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19205.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 111213200121 its reverse (121002312111), we get a palindrome (232215512232).

The spelling of 111213200121 in words is "one hundred eleven billion, two hundred thirteen million, two hundred thousand, one hundred twenty-one".