312123120311 has 4 divisors (see below), whose sum is σ = 312406097952. Its totient is φ = 311840142672.

The previous prime is 312123120307. The next prime is 312123120313. The reversal of 312123120311 is 113021321213.

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 312123120311 - 2² = 312123120307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312123120313) 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, 141487166 + ... + 141489371.

It is an arithmetic number, because the mean of its divisors is an integer number (78101524488).

Almost surely, 2^312123120311 is an apocalyptic number.

312123120311 is a deficient number, since it is larger than the sum of its proper divisors (282977641).

312123120311 is a wasteful number, since it uses less digits than its factorization.

312123120311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282977640.

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

Adding to 312123120311 its reverse (113021321213), we get a palindrome (425144441524).

The spelling of 312123120311 in words is "three hundred twelve billion, one hundred twenty-three million, one hundred twenty thousand, three hundred eleven".