2122122202021 has 2 divisors, whose sum is σ = 2122122202022. Its totient is φ = 2122122202020.

The previous prime is 2122122202019. The next prime is 2122122202027. The reversal of 2122122202021 is 1202022212212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1998858716100 + 123263485921 = 1413810^2 + 351089^2 .

It is a cyclic number.

It is not a de Polignac number, because 2122122202021 - 2¹ = 2122122202019 is a prime.

Together with 2122122202019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2122122202021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2122122202027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1061061101010 + 1061061101011.

It is an arithmetic number, because the mean of its divisors is an integer number (1061061101011).

Almost surely, 2^{2122122202021} is an apocalyptic number.

It is an amenable number.

2122122202021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2122122202021 is an equidigital number, since it uses as much as digits as its factorization.

2122122202021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2122122202021 its reverse (1202022212212), we get a palindrome (3324144414233).

The spelling of 2122122202021 in words is "two trillion, one hundred twenty-two billion, one hundred twenty-two million, two hundred two thousand, twenty-one".