111122112222121 has 64 divisors (see below), whose sum is σ = 150595025011200. Its totient is φ = 79180345497600.

The previous prime is 111122112222073. The next prime is 111122112222157. The reversal of 111122112222121 is 121222211221111.

It is a cyclic number.

It is not a de Polignac number, because 111122112222121 - 2⁷ = 111122112221993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111122112222092 and 111122112222101.

It is not an unprimeable number, because it can be changed into a prime (111122112222181) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 620631591 + ... + 620810611.

It is an arithmetic number, because the mean of its divisors is an integer number (2353047265800).

Almost surely, 2^{111122112222121} is an apocalyptic number.

111122112222121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111122112222121 is a deficient number, since it is larger than the sum of its proper divisors (39472912789079).

111122112222121 is a wasteful number, since it uses less digits than its factorization.

111122112222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184850.

The product of its digits is 128, while the sum is 22.

Adding to 111122112222121 its reverse (121222211221111), we get a palindrome (232344323443232).

The spelling of 111122112222121 in words is "one hundred eleven trillion, one hundred twenty-two billion, one hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".