22121223937 has 2 divisors, whose sum is σ = 22121223938. Its totient is φ = 22121223936.

The previous prime is 22121223931. The next prime is 22121223959. The reversal of 22121223937 is 73932212122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17516787201 + 4604436736 = 132351^2 + 67856^2 .

It is a cyclic number.

It is not a de Polignac number, because 22121223937 - 2¹⁹ = 22120699649 is a prime.

It is not a weakly prime, because it can be changed into another prime (22121223931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11060611968 + 11060611969.

It is an arithmetic number, because the mean of its divisors is an integer number (11060611969).

Almost surely, 2^22121223937 is an apocalyptic number.

It is an amenable number.

22121223937 is a deficient number, since it is larger than the sum of its proper divisors (1).

22121223937 is an equidigital number, since it uses as much as digits as its factorization.

22121223937 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The spelling of 22121223937 in words is "twenty-two billion, one hundred twenty-one million, two hundred twenty-three thousand, nine hundred thirty-seven".