1331321012 has 24 divisors (see below), whose sum is σ = 2665923456. Its totient is φ = 569863008.

The previous prime is 1331321003. The next prime is 1331321027. The reversal of 1331321012 is 2101231331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5843 + ... + 51930.

It is an arithmetic number, because the mean of its divisors is an integer number (111080144).

Almost surely, 2^1331321012 is an apocalyptic number.

It is an amenable number.

1331321012 is an abundant number, since it is smaller than the sum of its proper divisors (1334602444).

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

1331321012 is a wasteful number, since it uses less digits than its factorization.

1331321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58607 (or 58605 counting only the distinct ones).

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

The square root of 1331321012 is about 36487.2719177524. The cubic root of 1331321012 is about 1100.0884259493.

Adding to 1331321012 its reverse (2101231331), we get a palindrome (3432552343).

The spelling of 1331321012 in words is "one billion, three hundred thirty-one million, three hundred twenty-one thousand, twelve".