2311201123 has 16 divisors (see below), whose sum is σ = 2928741120. Its totient is φ = 1771408800.

The previous prime is 2311201117. The next prime is 2311201141. The reversal of 2311201123 is 3211021132.

It is not a de Polignac number, because 2311201123 - 2¹⁷ = 2311070051 is a prime.

It is a super-2 number, since 2×2311201123² = 10683301261912922258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2311201097 and 2311201106.

It is not an unprimeable number, because it can be changed into a prime (2311201523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 241333 + ... + 250726.

It is an arithmetic number, because the mean of its divisors is an integer number (183046320).

Almost surely, 2^2311201123 is an apocalyptic number.

2311201123 is a deficient number, since it is larger than the sum of its proper divisors (617539997).

2311201123 is a wasteful number, since it uses less digits than its factorization.

2311201123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492138.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2311201123 is about 48074.9531773043. The cubic root of 2311201123 is about 1322.1454860741.

Adding to 2311201123 its reverse (3211021132), we get a palindrome (5522222255).

Subtracting 2311201123 from its reverse (3211021132), we obtain a square (899820009 = 29997²).

The spelling of 2311201123 in words is "two billion, three hundred eleven million, two hundred one thousand, one hundred twenty-three".