22233220991 has 2 divisors, whose sum is σ = 22233220992. Its totient is φ = 22233220990.

The previous prime is 22233220981. The next prime is 22233221033. The reversal of 22233220991 is 19902233222.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22233220991 is a prime.

It is a super-2 number, since 2×22233220991² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22233220981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11116610495 + 11116610496.

It is an arithmetic number, because the mean of its divisors is an integer number (11116610496).

Almost surely, 2^22233220991 is an apocalyptic number.

22233220991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22233220991 is an equidigital number, since it uses as much as digits as its factorization.

22233220991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 22233220991 in words is "twenty-two billion, two hundred thirty-three million, two hundred twenty thousand, nine hundred ninety-one".