12311142011 has 4 divisors (see below), whose sum is σ = 14069876592. Its totient is φ = 10552407432.

The previous prime is 12311141993. The next prime is 12311142043. The reversal of 12311142011 is 11024111321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11024111321 = 103 ⋅107030207.

It is a de Polignac number, because none of the positive numbers 2^k-12311142011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12311144011) 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, 879367280 + ... + 879367293.

It is an arithmetic number, because the mean of its divisors is an integer number (3517469148).

Almost surely, 2^12311142011 is an apocalyptic number.

12311142011 is a deficient number, since it is larger than the sum of its proper divisors (1758734581).

12311142011 is an equidigital number, since it uses as much as digits as its factorization.

12311142011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758734580.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 12311142011 its reverse (11024111321), we get a palindrome (23335253332).

The spelling of 12311142011 in words is "twelve billion, three hundred eleven million, one hundred forty-two thousand, eleven".