22233221921 has 2 divisors, whose sum is σ = 22233221922. Its totient is φ = 22233221920.

The previous prime is 22233221897. The next prime is 22233221951. The reversal of 22233221921 is 12912233222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12519148321 + 9714073600 = 111889^2 + 98560^2 .

It is a cyclic number.

It is not a de Polignac number, because 22233221921 - 2¹⁴ = 22233205537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22233221951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11116610960 + 11116610961.

It is an arithmetic number, because the mean of its divisors is an integer number (11116610961).

Almost surely, 2^22233221921 is an apocalyptic number.

It is an amenable number.

22233221921 is a deficient number, since it is larger than the sum of its proper divisors (1).

22233221921 is an equidigital number, since it uses as much as digits as its factorization.

22233221921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The spelling of 22233221921 in words is "twenty-two billion, two hundred thirty-three million, two hundred twenty-one thousand, nine hundred twenty-one".