1321194814831 has 2 divisors, whose sum is σ = 1321194814832. Its totient is φ = 1321194814830.

The previous prime is 1321194814759. The next prime is 1321194814861. The reversal of 1321194814831 is 1384184911231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321194814831 is a prime.

It is a super-2 number, since 2×1321194814831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321194814861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660597407415 + 660597407416.

It is an arithmetic number, because the mean of its divisors is an integer number (660597407416).

Almost surely, 2^{1321194814831} is an apocalyptic number.

1321194814831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321194814831 is an equidigital number, since it uses as much as digits as its factorization.

1321194814831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 46.

The spelling of 1321194814831 in words is "one trillion, three hundred twenty-one billion, one hundred ninety-four million, eight hundred fourteen thousand, eight hundred thirty-one".