1121322157 has 2 divisors, whose sum is σ = 1121322158. Its totient is φ = 1121322156.

The previous prime is 1121322119. The next prime is 1121322179. The reversal of 1121322157 is 7512231211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 856967076 + 264355081 = 29274^2 + 16259^2 .

It is an emirp because it is prime and its reverse (7512231211) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1121322157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121352157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560661078 + 560661079.

It is an arithmetic number, because the mean of its divisors is an integer number (560661079).

Almost surely, 2^1121322157 is an apocalyptic number.

It is an amenable number.

1121322157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121322157 is an equidigital number, since it uses as much as digits as its factorization.

1121322157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 25.

The square root of 1121322157 is about 33486.1487334689. The cubic root of 1121322157 is about 1038.9073080314.

Adding to 1121322157 its reverse (7512231211), we get a palindrome (8633553368).

The spelling of 1121322157 in words is "one billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred fifty-seven".