111122011022121 has 24 divisors (see below), whose sum is σ = 175145759470656. Its totient is φ = 67329593051040.

The previous prime is 111122011022117. The next prime is 111122011022123. The reversal of 111122011022121 is 121220110221111.

It is a happy number.

111122011022121 is a `hidden beast` number, since 1 + 111 + 220 + 110 + 221 + 2 + 1 = 666.

It is not a de Polignac number, because 111122011022121 - 2² = 111122011022117 is a prime.

It is a super-2 number, since 2×111122011022121² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111122011022094 and 111122011022103.

It is not an unprimeable number, because it can be changed into a prime (111122011022123) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141943470 + ... + 142724183.

It is an arithmetic number, because the mean of its divisors is an integer number (7297739977944).

Almost surely, 2^{111122011022121} is an apocalyptic number.

111122011022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111122011022121 is a deficient number, since it is larger than the sum of its proper divisors (64023748448535).

111122011022121 is a wasteful number, since it uses less digits than its factorization.

111122011022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284671613 (or 284671610 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111122011022121 its reverse (121220110221111), we get a palindrome (232342121243232).

The spelling of 111122011022121 in words is "one hundred eleven trillion, one hundred twenty-two billion, eleven million, twenty-two thousand, one hundred twenty-one".