1312216612 has 24 divisors (see below), whose sum is σ = 2673953856. Its totient is φ = 551767008.

The previous prime is 1312216597. The next prime is 1312216643. The reversal of 1312216612 is 2166122131.

It is a happy 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, 440638 + ... + 443605.

It is an arithmetic number, because the mean of its divisors is an integer number (111414744).

Almost surely, 2^1312216612 is an apocalyptic number.

It is an amenable number.

1312216612 is an abundant number, since it is smaller than the sum of its proper divisors (1361737244).

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

1312216612 is a wasteful number, since it uses less digits than its factorization.

1312216612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884307 (or 884305 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 1312216612 is about 36224.5305283588. The cubic root of 1312216612 is about 1094.8009790986.

Adding to 1312216612 its reverse (2166122131), we get a palindrome (3478338743).

The spelling of 1312216612 in words is "one billion, three hundred twelve million, two hundred sixteen thousand, six hundred twelve".