1222220591 has 2 divisors, whose sum is σ = 1222220592. Its totient is φ = 1222220590.

The previous prime is 1222220579. The next prime is 1222220603. The reversal of 1222220591 is 1950222221.

It is a balanced prime because it is at equal distance from previous prime (1222220579) and next prime (1222220603).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222220591 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1222220591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222220501) 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, 611110295 + 611110296.

It is an arithmetic number, because the mean of its divisors is an integer number (611110296).

Almost surely, 2^1222220591 is an apocalyptic number.

1222220591 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222220591 is an equidigital number, since it uses as much as digits as its factorization.

1222220591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1222220591 is about 34960.2716093568. The cubic root of 1222220591 is about 1069.1776343437.

The spelling of 1222220591 in words is "one billion, two hundred twenty-two million, two hundred twenty thousand, five hundred ninety-one".