1222122557 has 2 divisors, whose sum is σ = 1222122558. Its totient is φ = 1222122556.

The previous prime is 1222122527. The next prime is 1222122589. The reversal of 1222122557 is 7552212221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647753401 + 574369156 = 25451^2 + 23966^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222122557 - 2¹⁸ = 1221860413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222122527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611061278 + 611061279.

It is an arithmetic number, because the mean of its divisors is an integer number (611061279).

Almost surely, 2^1222122557 is an apocalyptic number.

It is an amenable number.

1222122557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222122557 is an equidigital number, since it uses as much as digits as its factorization.

1222122557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 29.

The square root of 1222122557 is about 34958.8695040329. The cubic root of 1222122557 is about 1069.1490474248.

Adding to 1222122557 its reverse (7552212221), we get a palindrome (8774334778).

The spelling of 1222122557 in words is "one billion, two hundred twenty-two million, one hundred twenty-two thousand, five hundred fifty-seven".