1321225431499 has 2 divisors, whose sum is σ = 1321225431500. Its totient is φ = 1321225431498.

The previous prime is 1321225431481. The next prime is 1321225431523. The reversal of 1321225431499 is 9941345221231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321225431499 - 2²⁵ = 1321191877067 is a prime.

It is not a weakly prime, because it can be changed into another prime (1321225461499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660612715749 + 660612715750.

It is an arithmetic number, because the mean of its divisors is an integer number (660612715750).

Almost surely, 2^{1321225431499} is an apocalyptic number.

1321225431499 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321225431499 is an equidigital number, since it uses as much as digits as its factorization.

1321225431499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 46.

The spelling of 1321225431499 in words is "one trillion, three hundred twenty-one billion, two hundred twenty-five million, four hundred thirty-one thousand, four hundred ninety-nine".