2311122143 has 24 divisors (see below), whose sum is σ = 2634421440. Its totient is φ = 2023560000.

The previous prime is 2311122139. The next prime is 2311122181. The reversal of 2311122143 is 3412211132.

It is not a de Polignac number, because 2311122143 - 2² = 2311122139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311122193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2634821 + ... + 2635697.

It is an arithmetic number, because the mean of its divisors is an integer number (109767560).

Almost surely, 2^2311122143 is an apocalyptic number.

2311122143 is a deficient number, since it is larger than the sum of its proper divisors (323299297).

2311122143 is a wasteful number, since it uses less digits than its factorization.

2311122143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679 (or 1668 counting only the distinct ones).

The product of its digits is 288, while the sum is 20.

The square root of 2311122143 is about 48074.1317446296. The cubic root of 2311122143 is about 1322.1304254722.

Adding to 2311122143 its reverse (3412211132), we get a palindrome (5723333275).

It can be divided in two parts, 23111 and 22143, that added together give a palindrome (45254).

The spelling of 2311122143 in words is "two billion, three hundred eleven million, one hundred twenty-two thousand, one hundred forty-three".