22720435034021 has 2 divisors, whose sum is σ = 22720435034022. Its totient is φ = 22720435034020.

The previous prime is 22720435033997. The next prime is 22720435034023. The reversal of 22720435034021 is 12043053402722.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15244448683396 + 7475986350625 = 3904414^2 + 2734225^2 .

It is a cyclic number.

It is not a de Polignac number, because 22720435034021 - 2¹⁸ = 22720434771877 is a prime.

Together with 22720435034023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22720435034023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11360217517010 + 11360217517011.

It is an arithmetic number, because the mean of its divisors is an integer number (11360217517011).

Almost surely, 2^{22720435034021} is an apocalyptic number.

It is an amenable number.

22720435034021 is a deficient number, since it is larger than the sum of its proper divisors (1).

22720435034021 is an equidigital number, since it uses as much as digits as its factorization.

22720435034021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 35.

Adding to 22720435034021 its reverse (12043053402722), we get a palindrome (34763488436743).

The spelling of 22720435034021 in words is "twenty-two trillion, seven hundred twenty billion, four hundred thirty-five million, thirty-four thousand, twenty-one".