1322790121 has 2 divisors, whose sum is σ = 1322790122. Its totient is φ = 1322790120.

The previous prime is 1322790113. The next prime is 1322790223. The reversal of 1322790121 is 1210972231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 694586025 + 628204096 = 26355^2 + 25064^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322790121 - 2³ = 1322790113 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1322790121.

It is not a weakly prime, because it can be changed into another prime (1322791121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661395060 + 661395061.

It is an arithmetic number, because the mean of its divisors is an integer number (661395061).

Almost surely, 2^1322790121 is an apocalyptic number.

It is an amenable number.

1322790121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322790121 is an equidigital number, since it uses as much as digits as its factorization.

1322790121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 1322790121 is about 36370.1817564884. The cubic root of 1322790121 is about 1097.7336591869.

The spelling of 1322790121 in words is "one billion, three hundred twenty-two million, seven hundred ninety thousand, one hundred twenty-one".