1312221344 has 24 divisors (see below), whose sum is σ = 2952498528. Its totient is φ = 562380480.

The previous prime is 1312221343. The next prime is 1312221353. The reversal of 1312221344 is 4431222131.

It is not an unprimeable number, because it can be changed into a prime (1312221343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2928842 + ... + 2929289.

It is an arithmetic number, because the mean of its divisors is an integer number (123020772).

Almost surely, 2^1312221344 is an apocalyptic number.

1312221344 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1312221344 is an abundant number, since it is smaller than the sum of its proper divisors (1640277184).

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

1312221344 is an equidigital number, since it uses as much as digits as its factorization.

1312221344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5858148 (or 5858140 counting only the distinct ones).

The product of its digits is 1152, while the sum is 23.

The square root of 1312221344 is about 36224.5958431561. The cubic root of 1312221344 is about 1094.8022950887.

Adding to 1312221344 its reverse (4431222131), we get a palindrome (5743443475).

The spelling of 1312221344 in words is "one billion, three hundred twelve million, two hundred twenty-one thousand, three hundred forty-four".