1431431221399 has 16 divisors (see below), whose sum is σ = 1450656323200. Its totient is φ = 1412360330976.

The previous prime is 1431431221361. The next prime is 1431431221453. The reversal of 1431431221399 is 9931221341341.

It is a cyclic number.

It is not a de Polignac number, because 1431431221399 - 2³³ = 1422841286807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431431221309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14860717 + ... + 14956729.

It is an arithmetic number, because the mean of its divisors is an integer number (90666020200).

Almost surely, 2^{1431431221399} is an apocalyptic number.

1431431221399 is a deficient number, since it is larger than the sum of its proper divisors (19225101801).

1431431221399 is a wasteful number, since it uses less digits than its factorization.

1431431221399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96814.

The product of its digits is 139968, while the sum is 43.

The spelling of 1431431221399 in words is "one trillion, four hundred thirty-one billion, four hundred thirty-one million, two hundred twenty-one thousand, three hundred ninety-nine".