12222210991 has 2 divisors, whose sum is σ = 12222210992. Its totient is φ = 12222210990.

The previous prime is 12222210977. The next prime is 12222211019. The reversal of 12222210991 is 19901222221.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12222210991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222210191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111105495 + 6111105496.

It is an arithmetic number, because the mean of its divisors is an integer number (6111105496).

Almost surely, 2^12222210991 is an apocalyptic number.

12222210991 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222210991 is an equidigital number, since it uses as much as digits as its factorization.

12222210991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 12222210991 in words is "twelve billion, two hundred twenty-two million, two hundred ten thousand, nine hundred ninety-one".