1312213320 has 96 divisors (see below), whose sum is σ = 4652406720. Its totient is φ = 318111360.

The previous prime is 1312213313. The next prime is 1312213339. The reversal of 1312213320 is 233122131.

1312213320 is a `hidden beast` number, since 1 + 312 + 21 + 332 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1312213293 and 1312213302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161724 + ... + 169643.

It is an arithmetic number, because the mean of its divisors is an integer number (48462570).

Almost surely, 2^1312213320 is an apocalyptic number.

1312213320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312213320 is an abundant number, since it is smaller than the sum of its proper divisors (3340193400).

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

1312213320 is a wasteful number, since it uses less digits than its factorization.

1312213320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331395 (or 331388 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1312213320 is about 36224.4850895082. The cubic root of 1312213320 is about 1094.8000635771.

Adding to 1312213320 its reverse (233122131), we get a palindrome (1545335451).

The spelling of 1312213320 in words is "one billion, three hundred twelve million, two hundred thirteen thousand, three hundred twenty".