22133212991 has 2 divisors, whose sum is σ = 22133212992. Its totient is φ = 22133212990.

The previous prime is 22133212979. The next prime is 22133212999. The reversal of 22133212991 is 19921233122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22133212991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22133212999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11066606495 + 11066606496.

It is an arithmetic number, because the mean of its divisors is an integer number (11066606496).

Almost surely, 2^22133212991 is an apocalyptic number.

22133212991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22133212991 is an equidigital number, since it uses as much as digits as its factorization.

22133212991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The spelling of 22133212991 in words is "twenty-two billion, one hundred thirty-three million, two hundred twelve thousand, nine hundred ninety-one".