1321437921332 has 12 divisors (see below), whose sum is σ = 2312549907360. Its totient is φ = 660709376376.

The previous prime is 1321437921233. The next prime is 1321437921373. The reversal of 1321437921332 is 2331297341231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321437921332.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2081258 + ... + 2640929.

It is an arithmetic number, because the mean of its divisors is an integer number (192712492280).

Almost surely, 2^{1321437921332} is an apocalyptic number.

It is an amenable number.

1321437921332 is a deficient number, since it is larger than the sum of its proper divisors (991111986028).

1321437921332 is a wasteful number, since it uses less digits than its factorization.

1321437921332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4792150 (or 4792148 counting only the distinct ones).

The product of its digits is 163296, while the sum is 41.

The spelling of 1321437921332 in words is "one trillion, three hundred twenty-one billion, four hundred thirty-seven million, nine hundred twenty-one thousand, three hundred thirty-two".