22121242004423 has 2 divisors, whose sum is σ = 22121242004424. Its totient is φ = 22121242004422.

The previous prime is 22121242004413. The next prime is 22121242004429. The reversal of 22121242004423 is 32440024212122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22121242004423 - 2⁴² = 17723195493319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121242004429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060621002211 + 11060621002212.

It is an arithmetic number, because the mean of its divisors is an integer number (11060621002212).

Almost surely, 2^{22121242004423} is an apocalyptic number.

22121242004423 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121242004423 is an equidigital number, since it uses as much as digits as its factorization.

22121242004423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 22121242004423 its reverse (32440024212122), we get a palindrome (54561266216545).

The spelling of 22121242004423 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred forty-two million, four thousand, four hundred twenty-three".