311303012123 has 4 divisors (see below), whose sum is σ = 314325371568. Its totient is φ = 308280652680.

The previous prime is 311303012099. The next prime is 311303012161. The reversal of 311303012123 is 321210303113.

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 311303012123 - 2²⁰ = 311301963547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 311303012095 and 311303012104.

It is not an unprimeable number, because it can be changed into a prime (311303012723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1511179568 + ... + 1511179773.

It is an arithmetic number, because the mean of its divisors is an integer number (78581342892).

Almost surely, 2^311303012123 is an apocalyptic number.

311303012123 is a deficient number, since it is larger than the sum of its proper divisors (3022359445).

311303012123 is a wasteful number, since it uses less digits than its factorization.

311303012123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3022359444.

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

Adding to 311303012123 its reverse (321210303113), we get a palindrome (632513315236).

The spelling of 311303012123 in words is "three hundred eleven billion, three hundred three million, twelve thousand, one hundred twenty-three".