1321039361 has 2 divisors, whose sum is σ = 1321039362. Its totient is φ = 1321039360.

The previous prime is 1321039327. The next prime is 1321039397. The reversal of 1321039361 is 1639301231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699285136 + 621754225 = 26444^2 + 24935^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321039361 - 2¹⁴ = 1321022977 is a prime.

It is a super-2 number, since 2×1321039361² = 3490289986622576642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1321039061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660519680 + 660519681.

It is an arithmetic number, because the mean of its divisors is an integer number (660519681).

Almost surely, 2^1321039361 is an apocalyptic number.

It is an amenable number.

1321039361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321039361 is an equidigital number, since it uses as much as digits as its factorization.

1321039361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 1321039361 is about 36346.1051696052. The cubic root of 1321039361 is about 1097.2491487918.

The spelling of 1321039361 in words is "one billion, three hundred twenty-one million, thirty-nine thousand, three hundred sixty-one".