1321011992 has 16 divisors (see below), whose sum is σ = 2584589040. Its totient is φ = 631788256.

The previous prime is 1321011971. The next prime is 1321012019. The reversal of 1321011992 is 2991101231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3589523 + ... + 3589890.

It is an arithmetic number, because the mean of its divisors is an integer number (161536815).

Almost surely, 2^1321011992 is an apocalyptic number.

It is an amenable number.

1321011992 is a deficient number, since it is larger than the sum of its proper divisors (1263577048).

1321011992 is a wasteful number, since it uses less digits than its factorization.

1321011992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7179442 (or 7179438 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 29.

The square root of 1321011992 is about 36345.7286623889. The cubic root of 1321011992 is about 1097.2415712181.

The spelling of 1321011992 in words is "one billion, three hundred twenty-one million, eleven thousand, nine hundred ninety-two".