1222057391 has 2 divisors, whose sum is σ = 1222057392. Its totient is φ = 1222057390.

The previous prime is 1222057381. The next prime is 1222057433. The reversal of 1222057391 is 1937502221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222057391 - 2⁶ = 1222057327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222057301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611028695 + 611028696.

It is an arithmetic number, because the mean of its divisors is an integer number (611028696).

Almost surely, 2^1222057391 is an apocalyptic number.

1222057391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222057391 is an equidigital number, since it uses as much as digits as its factorization.

1222057391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 1222057391 is about 34957.9374534597. The cubic root of 1222057391 is about 1069.1300440374.

The spelling of 1222057391 in words is "one billion, two hundred twenty-two million, fifty-seven thousand, three hundred ninety-one".