22020202212521 has 2 divisors, whose sum is σ = 22020202212522. Its totient is φ = 22020202212520.

The previous prime is 22020202212511. The next prime is 22020202212529. The reversal of 22020202212521 is 12521220202022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21446494433296 + 573707779225 = 4631036^2 + 757435^2 .

It is a cyclic number.

It is not a de Polignac number, because 22020202212521 - 2³⁸ = 21745324305577 is a prime.

It is not a weakly prime, because it can be changed into another prime (22020202212529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11010101106260 + 11010101106261.

It is an arithmetic number, because the mean of its divisors is an integer number (11010101106261).

Almost surely, 2^{22020202212521} is an apocalyptic number.

It is an amenable number.

22020202212521 is a deficient number, since it is larger than the sum of its proper divisors (1).

22020202212521 is an equidigital number, since it uses as much as digits as its factorization.

22020202212521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 22020202212521 its reverse (12521220202022), we get a palindrome (34541422414543).

The spelling of 22020202212521 in words is "twenty-two trillion, twenty billion, two hundred two million, two hundred twelve thousand, five hundred twenty-one".