2221122232991 has 2 divisors, whose sum is σ = 2221122232992. Its totient is φ = 2221122232990.

The previous prime is 2221122232981. The next prime is 2221122232999. The reversal of 2221122232991 is 1992322211222.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2221122232991 - 2²² = 2221118038687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221122232999) 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, 1110561116495 + 1110561116496.

It is an arithmetic number, because the mean of its divisors is an integer number (1110561116496).

Almost surely, 2^{2221122232991} is an apocalyptic number.

2221122232991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221122232991 is an equidigital number, since it uses as much as digits as its factorization.

2221122232991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 38.

The spelling of 2221122232991 in words is "two trillion, two hundred twenty-one billion, one hundred twenty-two million, two hundred thirty-two thousand, nine hundred ninety-one".