2311220123 has 2 divisors, whose sum is σ = 2311220124. Its totient is φ = 2311220122.

The previous prime is 2311220111. The next prime is 2311220147. The reversal of 2311220123 is 3210221132.

2311220123 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 is a cyclic number.

It is not a de Polignac number, because 2311220123 - 2³⁰ = 1237478299 is a prime.

It is not a weakly prime, because it can be changed into another prime (2311220183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1155610061 + 1155610062.

It is an arithmetic number, because the mean of its divisors is an integer number (1155610062).

Almost surely, 2^2311220123 is an apocalyptic number.

2311220123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2311220123 is an equidigital number, since it uses as much as digits as its factorization.

2311220123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2311220123 is about 48075.1507849949. The cubic root of 2311220123 is about 1322.1491091102.

Adding to 2311220123 its reverse (3210221132), we get a palindrome (5521441255).

The spelling of 2311220123 in words is "two billion, three hundred eleven million, two hundred twenty thousand, one hundred twenty-three".