1313212112 has 20 divisors (see below), whose sum is σ = 2545538340. Its totient is φ = 656299008.

The previous prime is 1313212099. The next prime is 1313212169. The reversal of 1313212112 is 2112123131.

It can be written as a sum of positive squares in 2 ways, for example, as 1269069376 + 44142736 = 35624^2 + 6644^2 .

It is a super-2 number, since 2×1313212112² = 3449052102207001088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18314 + ... + 54422.

It is an arithmetic number, because the mean of its divisors is an integer number (127276917).

Almost surely, 2^1313212112 is an apocalyptic number.

It is an amenable number.

1313212112 is a deficient number, since it is larger than the sum of its proper divisors (1232326228).

1313212112 is a wasteful number, since it uses less digits than its factorization.

1313212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38390 (or 38384 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1313212112 is about 36238.2686120626. The cubic root of 1313212112 is about 1095.0777623862.

Adding to 1313212112 its reverse (2112123131), we get a palindrome (3425335243).

The spelling of 1313212112 in words is "one billion, three hundred thirteen million, two hundred twelve thousand, one hundred twelve".