2122221112021 has 2 divisors, whose sum is σ = 2122221112022. Its totient is φ = 2122221112020.

The previous prime is 2122221112001. The next prime is 2122221112027. The reversal of 2122221112021 is 1202111222212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1306380420900 + 815840691121 = 1142970^2 + 903239^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122221112021 - 2⁷ = 2122221111893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2122221112021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122221112027) 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 as a sum of consecutive naturals, namely, 1061110556010 + 1061110556011.

It is an arithmetic number, because the mean of its divisors is an integer number (1061110556011).

Almost surely, 2^{2122221112021} is an apocalyptic number.

It is an amenable number.

2122221112021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122221112021 is an equidigital number, since it uses as much as digits as its factorization.

2122221112021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 2122221112021 its reverse (1202111222212), we get a palindrome (3324332334233).

The spelling of 2122221112021 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-one million, one hundred twelve thousand, twenty-one".