111121022102021 has 2 divisors, whose sum is σ = 111121022102022. Its totient is φ = 111121022102020.

The previous prime is 111121022101997. The next prime is 111121022102029. The reversal of 111121022102021 is 120201220121111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69804537817921 + 41316484284100 = 8354911^2 + 6427790^2 .

It is an emirp because it is prime and its reverse (120201220121111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111121022102021 - 2²² = 111121017907717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111121022102029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55560511051010 + 55560511051011.

It is an arithmetic number, because the mean of its divisors is an integer number (55560511051011).

Almost surely, 2^{111121022102021} is an apocalyptic number.

It is an amenable number.

111121022102021 is a deficient number, since it is larger than the sum of its proper divisors (1).

111121022102021 is an equidigital number, since it uses as much as digits as its factorization.

111121022102021 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 111121022102021 its reverse (120201220121111), we get a palindrome (231322242223132).

The spelling of 111121022102021 in words is "one hundred eleven trillion, one hundred twenty-one billion, twenty-two million, one hundred two thousand, twenty-one".