1331021312 has 40 divisors (see below), whose sum is σ = 2721335496. Its totient is φ = 650022912.

The previous prime is 1331021303. The next prime is 1331021333. The reversal of 1331021312 is 2131201331.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8213 + ... + 52244.

Almost surely, 2^1331021312 is an apocalyptic number.

It is an amenable number.

1331021312 is an abundant number, since it is smaller than the sum of its proper divisors (1390314184).

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

1331021312 is an frugal number, since it uses more digits than its factorization.

1331021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60518 (or 60502 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1331021312 is about 36483.1647750027. The cubic root of 1331021312 is about 1100.0058710430.

Adding to 1331021312 its reverse (2131201331), we get a palindrome (3462222643).

The spelling of 1331021312 in words is "one billion, three hundred thirty-one million, twenty-one thousand, three hundred twelve".