1321310012 has 24 divisors (see below), whose sum is σ = 2537619840. Its totient is φ = 596995760.

The previous prime is 1321310009. The next prime is 1321310033. The reversal of 1321310012 is 2100131231.

It is a super-2 number, since 2×1321310012² = 3491720295622880288, which contains 22 as substring.

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, 82562 + ... + 97257.

It is an arithmetic number, because the mean of its divisors is an integer number (105734160).

Almost surely, 2^1321310012 is an apocalyptic number.

It is an amenable number.

1321310012 is a deficient number, since it is larger than the sum of its proper divisors (1216309828).

1321310012 is a wasteful number, since it uses less digits than its factorization.

1321310012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180001 (or 179999 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1321310012 is about 36349.8282251787. The cubic root of 1321310012 is about 1097.3240774956.

Adding to 1321310012 its reverse (2100131231), we get a palindrome (3421441243).

The spelling of 1321310012 in words is "one billion, three hundred twenty-one million, three hundred ten thousand, twelve".