111010112222021 has 2 divisors, whose sum is σ = 111010112222022. Its totient is φ = 111010112222020.

The previous prime is 111010112221997. The next prime is 111010112222039. The reversal of 111010112222021 is 120222211010111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102254283271396 + 8755828950625 = 10112086^2 + 2959025^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111010112222021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111010112222221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505056111010 + 55505056111011.

It is an arithmetic number, because the mean of its divisors is an integer number (55505056111011).

Almost surely, 2^{111010112222021} is an apocalyptic number.

It is an amenable number.

111010112222021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111010112222021 is an equidigital number, since it uses as much as digits as its factorization.

111010112222021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111010112222021 its reverse (120222211010111), we get a palindrome (231232323232132).

The spelling of 111010112222021 in words is "one hundred eleven trillion, ten billion, one hundred twelve million, two hundred twenty-two thousand, twenty-one".