2311123001123 has 4 divisors (see below), whose sum is σ = 2311138497120. Its totient is φ = 2311107505128.

The previous prime is 2311123001119. The next prime is 2311123001141. The reversal of 2311123001123 is 3211003211132.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2311123001123 - 2² = 2311123001119 is a prime.

It is a super-2 number, since 2×2311123001123² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2311123001095 and 2311123001104.

It is not an unprimeable number, because it can be changed into a prime (2311123001323) 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, 7522088 + ... + 7823301.

It is an arithmetic number, because the mean of its divisors is an integer number (577784624280).

Almost surely, 2^{2311123001123} is an apocalyptic number.

2311123001123 is a deficient number, since it is larger than the sum of its proper divisors (15495997).

2311123001123 is a wasteful number, since it uses less digits than its factorization.

2311123001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15495996.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 2311123001123 its reverse (3211003211132), we get a palindrome (5522126212255).

The spelling of 2311123001123 in words is "two trillion, three hundred eleven billion, one hundred twenty-three million, one thousand, one hundred twenty-three".