1321315112 has 64 divisors (see below), whose sum is σ = 2728857600. Its totient is φ = 596090880.

The previous prime is 1321315087. The next prime is 1321315129. The reversal of 1321315112 is 2115131231.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 937064 + ... + 938472.

It is an arithmetic number, because the mean of its divisors is an integer number (42638400).

Almost surely, 2^1321315112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321315112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364428800).

1321315112 is an abundant number, since it is smaller than the sum of its proper divisors (1407542488).

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

1321315112 is a wasteful number, since it uses less digits than its factorization.

1321315112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1626 (or 1622 counting only the distinct ones).

The product of its digits is 180, while the sum is 20.

The square root of 1321315112 is about 36349.8983767493. The cubic root of 1321315112 is about 1097.3254893130.

Adding to 1321315112 its reverse (2115131231), we get a palindrome (3436446343).

The spelling of 1321315112 in words is "one billion, three hundred twenty-one million, three hundred fifteen thousand, one hundred twelve".