13111312 has 10 divisors (see below), whose sum is σ = 25403198. Its totient is φ = 6555648.

The previous prime is 13111309. The next prime is 13111327. The reversal of 13111312 is 21311131.

It can be written as a sum of positive squares in only one way, i.e., 12845056 + 266256 = 3584^2 + 516^2 .

It is a super-2 number, since 2×13111312² = 343813004722688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13111292 and 13111301.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 409713 + ... + 409744.

Almost surely, 2^13111312 is an apocalyptic number.

It is an amenable number.

13111312 is a deficient number, since it is larger than the sum of its proper divisors (12291886).

13111312 is an equidigital number, since it uses as much as digits as its factorization.

13111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819465 (or 819459 counting only the distinct ones).

The product of its digits is 18, while the sum is 13.

The square root of 13111312 is about 3620.9545702756. The cubic root of 13111312 is about 235.8026694834.

Adding to 13111312 its reverse (21311131), we get a palindrome (34422443).

It can be divided in two parts, 1311131 and 2, that multiplied together give a palindrome (2622262).

The spelling of 13111312 in words is "thirteen million, one hundred eleven thousand, three hundred twelve".