1321163731425 has 48 divisors (see below), whose sum is σ = 2193545443392. Its totient is φ = 701651462400.

The previous prime is 1321163731417. The next prime is 1321163731471. The reversal of 1321163731425 is 5241373611231.

It is not a de Polignac number, because 1321163731425 - 2³ = 1321163731417 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19667395 + ... + 19734455.

It is an arithmetic number, because the mean of its divisors is an integer number (45698863404).

Almost surely, 2^{1321163731425} is an apocalyptic number.

1321163731425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1321163731425 is a deficient number, since it is larger than the sum of its proper divisors (872381711967).

1321163731425 is a wasteful number, since it uses less digits than its factorization.

1321163731425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68178 (or 68173 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The spelling of 1321163731425 in words is "one trillion, three hundred twenty-one billion, one hundred sixty-three million, seven hundred thirty-one thousand, four hundred twenty-five".