2311143111881 has 2 divisors, whose sum is σ = 2311143111882. Its totient is φ = 2311143111880.

The previous prime is 2311143111841. The next prime is 2311143111931. The reversal of 2311143111881 is 1881113411132.

2311143111881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2208615071881 + 102528040000 = 1486141^2 + 320200^2 .

It is a cyclic number.

It is not a de Polignac number, because 2311143111881 - 2³⁸ = 2036265204937 is a prime.

It is a super-2 number, since 2×2311143111881² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2311143111841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155571555940 + 1155571555941.

It is an arithmetic number, because the mean of its divisors is an integer number (1155571555941).

Almost surely, 2^{2311143111881} is an apocalyptic number.

It is an amenable number.

2311143111881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311143111881 is an equidigital number, since it uses as much as digits as its factorization.

2311143111881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 35.

The spelling of 2311143111881 in words is "two trillion, three hundred eleven billion, one hundred forty-three million, one hundred eleven thousand, eight hundred eighty-one".