311310312123 has 16 divisors (see below), whose sum is σ = 434865191936. Its totient is φ = 197847666720.

The previous prime is 311310312107. The next prime is 311310312191. The reversal of 311310312123 is 321213013113.

It is a happy number.

It is not a de Polignac number, because 311310312123 - 2⁴ = 311310312107 is a prime.

It is a super-2 number, since 2×311310312123² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311310312123.

It is not an unprimeable number, because it can be changed into a prime (311310312223) 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, 24974536 + ... + 24986997.

It is an arithmetic number, because the mean of its divisors is an integer number (27179074496).

Almost surely, 2^311310312123 is an apocalyptic number.

311310312123 is a deficient number, since it is larger than the sum of its proper divisors (123554879813).

311310312123 is a wasteful number, since it uses less digits than its factorization.

311310312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49961634.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 311310312123 its reverse (321213013113), we get a palindrome (632523325236).

The spelling of 311310312123 in words is "three hundred eleven billion, three hundred ten million, three hundred twelve thousand, one hundred twenty-three".