22121110421453 has 2 divisors, whose sum is σ = 22121110421454. Its totient is φ = 22121110421452.

The previous prime is 22121110421413. The next prime is 22121110421477. The reversal of 22121110421453 is 35412401112122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21618240809764 + 502869611689 = 4649542^2 + 709133^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121110421453 - 2²⁸ = 22120841985997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121110421413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060555210726 + 11060555210727.

It is an arithmetic number, because the mean of its divisors is an integer number (11060555210727).

Almost surely, 2^{22121110421453} is an apocalyptic number.

It is an amenable number.

22121110421453 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121110421453 is an equidigital number, since it uses as much as digits as its factorization.

22121110421453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

Adding to 22121110421453 its reverse (35412401112122), we get a palindrome (57533511533575).

The spelling of 22121110421453 in words is "twenty-two trillion, one hundred twenty-one billion, one hundred ten million, four hundred twenty-one thousand, four hundred fifty-three".