1321110719 has 2 divisors, whose sum is σ = 1321110720. Its totient is φ = 1321110718.

The previous prime is 1321110691. The next prime is 1321110743. The reversal of 1321110719 is 9170111231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1321110719 - 2⁸ = 1321110463 is a prime.

It is a super-2 number, since 2×1321110719² = 3490667063713393922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321110779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660555359 + 660555360.

It is an arithmetic number, because the mean of its divisors is an integer number (660555360).

Almost surely, 2^1321110719 is an apocalyptic number.

1321110719 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321110719 is an equidigital number, since it uses as much as digits as its factorization.

1321110719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 26.

The square root of 1321110719 is about 36347.0868021084. The cubic root of 1321110719 is about 1097.2689049771.

The spelling of 1321110719 in words is "one billion, three hundred twenty-one million, one hundred ten thousand, seven hundred nineteen".