111122012121021 has 48 divisors (see below), whose sum is σ = 175370158484352. Its totient is φ = 67243321420800.

The previous prime is 111122012120971. The next prime is 111122012121037. The reversal of 111122012121021 is 120121210221111.

It is a happy number.

111122012121021 is a `hidden beast` number, since 1 + 111 + 220 + 121 + 210 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-111122012121021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111122012120985 and 111122012121003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122012121061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 396552841 + ... + 396832961.

It is an arithmetic number, because the mean of its divisors is an integer number (3653544968424).

Almost surely, 2^{111122012121021} is an apocalyptic number.

111122012121021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111122012121021 is a deficient number, since it is larger than the sum of its proper divisors (64248146363331).

111122012121021 is a wasteful number, since it uses less digits than its factorization.

111122012121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286274 (or 286271 counting only the distinct ones).

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

Adding to 111122012121021 its reverse (120121210221111), we get a palindrome (231243222342132).

The spelling of 111122012121021 in words is "one hundred eleven trillion, one hundred twenty-two billion, twelve million, one hundred twenty-one thousand, twenty-one".