311323001123 has 4 divisors (see below), whose sum is σ = 311330257680. Its totient is φ = 311315744568.

The previous prime is 311323001081. The next prime is 311323001149. The reversal of 311323001123 is 321100323113.

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 311323001123 - 2³⁴ = 294143131939 is a prime.

It is a super-2 number, since 2×311323001123² (a number of 24 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 = 311323001095 and 311323001104.

It is not an unprimeable number, because it can be changed into a prime (311323001173) 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, 3563540 + ... + 3649857.

It is an arithmetic number, because the mean of its divisors is an integer number (77832564420).

Almost surely, 2^311323001123 is an apocalyptic number.

311323001123 is a deficient number, since it is larger than the sum of its proper divisors (7256557).

311323001123 is an equidigital number, since it uses as much as digits as its factorization.

311323001123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7256556.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 311323001123 its reverse (321100323113), we get a palindrome (632423324236).

The spelling of 311323001123 in words is "three hundred eleven billion, three hundred twenty-three million, one thousand, one hundred twenty-three".