1321899285612 has 54 divisors (see below), whose sum is σ = 3136401483852. Its totient is φ = 433329945600.

The previous prime is 1321899285559. The next prime is 1321899285691. The reversal of 1321899285612 is 2165829981231.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 242948812 + ... + 242954252.

Almost surely, 2^{1321899285612} is an apocalyptic number.

1321899285612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321899285612 is an abundant number, since it is smaller than the sum of its proper divisors (1814502198240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321899285612 is an frugal number, since it uses more digits than its factorization.

1321899285612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11011 (or 5507 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 57.

The spelling of 1321899285612 in words is "one trillion, three hundred twenty-one billion, eight hundred ninety-nine million, two hundred eighty-five thousand, six hundred twelve".