1321894492915 has 32 divisors (see below), whose sum is σ = 1668052611072. Its totient is φ = 1003722720000.

The previous prime is 1321894492901. The next prime is 1321894492937. The reversal of 1321894492915 is 5192944981231.

It is not a de Polignac number, because 1321894492915 - 2²¹ = 1321892395763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1321894492915.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15777735 + ... + 15861295.

It is an arithmetic number, because the mean of its divisors is an integer number (52126644096).

Almost surely, 2^{1321894492915} is an apocalyptic number.

1321894492915 is a deficient number, since it is larger than the sum of its proper divisors (346158118157).

1321894492915 is a wasteful number, since it uses less digits than its factorization.

1321894492915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84651.

The product of its digits is 5598720, while the sum is 58.

The spelling of 1321894492915 in words is "one trillion, three hundred twenty-one billion, eight hundred ninety-four million, four hundred ninety-two thousand, nine hundred fifteen".