12313112011 has 4 divisors (see below), whose sum is σ = 12320775792. Its totient is φ = 12305448232.

The previous prime is 12313111969. The next prime is 12313112017. The reversal of 12313112011 is 11021131321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12313112011 is a prime.

It is a super-2 number, since 2×12313112011² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12313112017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3829480 + ... + 3832693.

It is an arithmetic number, because the mean of its divisors is an integer number (3080193948).

Almost surely, 2^12313112011 is an apocalyptic number.

12313112011 is a deficient number, since it is larger than the sum of its proper divisors (7663781).

12313112011 is an equidigital number, since it uses as much as digits as its factorization.

12313112011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7663780.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 12313112011 its reverse (11021131321), we get a palindrome (23334243332).

The spelling of 12313112011 in words is "twelve billion, three hundred thirteen million, one hundred twelve thousand, eleven".