1321331912 has 8 divisors (see below), whose sum is σ = 2477497350. Its totient is φ = 660665952.

The previous prime is 1321331903. The next prime is 1321331927. The reversal of 1321331912 is 2191331231.

It can be written as a sum of positive squares in only one way, i.e., 1155592036 + 165739876 = 33994^2 + 12874^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82583237 + ... + 82583252.

Almost surely, 2^1321331912 is an apocalyptic number.

It is an amenable number.

1321331912 is a deficient number, since it is larger than the sum of its proper divisors (1156165438).

1321331912 is a wasteful number, since it uses less digits than its factorization.

1321331912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165166495 (or 165166491 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 1321331912 is about 36350.1294633183. The cubic root of 1321331912 is about 1097.3301399801.

The spelling of 1321331912 in words is "one billion, three hundred twenty-one million, three hundred thirty-one thousand, nine hundred twelve".