1312321110 has 16 divisors (see below), whose sum is σ = 3149570736. Its totient is φ = 349952288.

The previous prime is 1312321039. The next prime is 1312321123. The reversal of 1312321110 is 111232131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1312321110.

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, 21871989 + ... + 21872048.

It is an arithmetic number, because the mean of its divisors is an integer number (196848171).

Almost surely, 2^1312321110 is an apocalyptic number.

1312321110 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1312321110 is an abundant number, since it is smaller than the sum of its proper divisors (1837249626).

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

1312321110 is a wasteful number, since it uses less digits than its factorization.

1312321110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43744047.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1312321110 is about 36225.9728647831. The cubic root of 1312321110 is about 1094.8300397164.

Adding to 1312321110 its reverse (111232131), we get a palindrome (1423553241).

The spelling of 1312321110 in words is "one billion, three hundred twelve million, three hundred twenty-one thousand, one hundred ten".