22121110423 has 2 divisors, whose sum is σ = 22121110424. Its totient is φ = 22121110422.

The previous prime is 22121110421. The next prime is 22121110457. The reversal of 22121110423 is 32401112122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22121110423 - 2¹ = 22121110421 is a prime.

Together with 22121110421, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22121110423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22121110421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060555211 + 11060555212.

It is an arithmetic number, because the mean of its divisors is an integer number (11060555212).

Almost surely, 2^22121110423 is an apocalyptic number.

22121110423 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121110423 is an equidigital number, since it uses as much as digits as its factorization.

22121110423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 22121110423 its reverse (32401112122), we get a palindrome (54522222545).

The spelling of 22121110423 in words is "twenty-two billion, one hundred twenty-one million, one hundred ten thousand, four hundred twenty-three".