2122221022021 has 2 divisors, whose sum is σ = 2122221022022. Its totient is φ = 2122221022020.

The previous prime is 2122221022013. The next prime is 2122221022157. The reversal of 2122221022021 is 1202201222212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2057821809121 + 64399212900 = 1434511^2 + 253770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122221022021 - 2³ = 2122221022013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2122221022021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122221026021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061110511010 + 1061110511011.

It is an arithmetic number, because the mean of its divisors is an integer number (1061110511011).

Almost surely, 2^{2122221022021} is an apocalyptic number.

It is an amenable number.

2122221022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122221022021 is an equidigital number, since it uses as much as digits as its factorization.

2122221022021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 2122221022021 its reverse (1202201222212), we get a palindrome (3324422244233).

The spelling of 2122221022021 in words is "two trillion, one hundred twenty-two billion, two hundred twenty-one million, twenty-two thousand, twenty-one".