111112100012021 has 2 divisors, whose sum is σ = 111112100012022. Its totient is φ = 111112100012020.

The previous prime is 111112100012009. The next prime is 111112100012063. The reversal of 111112100012021 is 120210001211111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69312784684900 + 41799315327121 = 8325430^2 + 6465239^2 .

It is a cyclic number.

It is not a de Polignac number, because 111112100012021 - 2¹⁰ = 111112100010997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111112100011987 and 111112100012005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111112100012521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55556050006010 + 55556050006011.

It is an arithmetic number, because the mean of its divisors is an integer number (55556050006011).

Almost surely, 2^{111112100012021} is an apocalyptic number.

It is an amenable number.

111112100012021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111112100012021 is an equidigital number, since it uses as much as digits as its factorization.

111112100012021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111112100012021 its reverse (120210001211111), we get a palindrome (231322101223132).

The spelling of 111112100012021 in words is "one hundred eleven trillion, one hundred twelve billion, one hundred million, twelve thousand, twenty-one".