1321311310 has 64 divisors (see below), whose sum is σ = 2665301760. Its totient is φ = 467470080.

The previous prime is 1321311307. The next prime is 1321311323. The reversal of 1321311310 is 131131231.

It is a super-2 number, since 2×1321311310² = 3491727155867832200, 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 31 ways as a sum of consecutive naturals, for example, 1934229 + ... + 1934911.

It is an arithmetic number, because the mean of its divisors is an integer number (41645340).

Almost surely, 2^1321311310 is an apocalyptic number.

1321311310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1321311310 is an abundant number, since it is smaller than the sum of its proper divisors (1343990450).

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

1321311310 is a wasteful number, since it uses less digits than its factorization.

1321311310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1321311310 is about 36349.8460794540. The cubic root of 1321311310 is about 1097.3244368173.

Adding to 1321311310 its reverse (131131231), we get a palindrome (1452442541).

The spelling of 1321311310 in words is "one billion, three hundred twenty-one million, three hundred eleven thousand, three hundred ten".