1222122022021 has 2 divisors, whose sum is σ = 1222122022022. Its totient is φ = 1222122022020.

The previous prime is 1222122022007. The next prime is 1222122022061. The reversal of 1222122022021 is 1202202212221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1114895244996 + 107226777025 = 1055886^2 + 327455^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222122022021 - 2⁷ = 1222122021893 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222122022021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222122022061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611061011010 + 611061011011.

It is an arithmetic number, because the mean of its divisors is an integer number (611061011011).

Almost surely, 2^{1222122022021} is an apocalyptic number.

It is an amenable number.

1222122022021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222122022021 is an equidigital number, since it uses as much as digits as its factorization.

1222122022021 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 1222122022021 its reverse (1202202212221), we get a palindrome (2424324234242).

The spelling of 1222122022021 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-two million, twenty-two thousand, twenty-one".