22011220999 has 2 divisors, whose sum is σ = 22011221000. Its totient is φ = 22011220998.

The previous prime is 22011220991. The next prime is 22011221017. The reversal of 22011220999 is 99902211022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22011220999 - 2³ = 22011220991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22011220991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11005610499 + 11005610500.

It is an arithmetic number, because the mean of its divisors is an integer number (11005610500).

Almost surely, 2^22011220999 is an apocalyptic number.

22011220999 is a deficient number, since it is larger than the sum of its proper divisors (1).

22011220999 is an equidigital number, since it uses as much as digits as its factorization.

22011220999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 37.

The spelling of 22011220999 in words is "twenty-two billion, eleven million, two hundred twenty thousand, nine hundred ninety-nine".