111112110112021 has 2 divisors, whose sum is σ = 111112110112022. Its totient is φ = 111112110112020.

The previous prime is 111112110111997. The next prime is 111112110112093. The reversal of 111112110112021 is 120211011211111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110400432279921 + 711677832100 = 10507161^2 + 843610^2 .

It is a cyclic number.

It is not a de Polignac number, because 111112110112021 - 2¹⁵ = 111112110079253 is a prime.

It is a super-2 number, since 2×111112110112021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111112110111986 and 111112110112004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111112110112721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556055056010 + 55556055056011.

It is an arithmetic number, because the mean of its divisors is an integer number (55556055056011).

Almost surely, 2^{111112110112021} is an apocalyptic number.

It is an amenable number.

111112110112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112110112021 is an equidigital number, since it uses as much as digits as its factorization.

111112110112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 111112110112021 its reverse (120211011211111), we get a palindrome (231323121323132).

The spelling of 111112110112021 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred ten million, one hundred twelve thousand, twenty-one".