22201209991 has 2 divisors, whose sum is σ = 22201209992. Its totient is φ = 22201209990.

The previous prime is 22201209973. The next prime is 22201210013. The reversal of 22201209991 is 19990210222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22201209991 - 2¹⁵ = 22201177223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22201209991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22201209911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11100604995 + 11100604996.

It is an arithmetic number, because the mean of its divisors is an integer number (11100604996).

Almost surely, 2^22201209991 is an apocalyptic number.

22201209991 is a deficient number, since it is larger than the sum of its proper divisors (1).

22201209991 is an equidigital number, since it uses as much as digits as its factorization.

22201209991 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 22201209991 in words is "twenty-two billion, two hundred one million, two hundred nine thousand, nine hundred ninety-one".