312111210123 has 16 divisors (see below), whose sum is σ = 462438720000. Its totient is φ = 208050856200.

The previous prime is 312111210049. The next prime is 312111210163. The reversal of 312111210123 is 321012111213.

It is not a de Polignac number, because 312111210123 - 2¹⁰ = 312111209099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 312111210096 and 312111210105.

It is not an unprimeable number, because it can be changed into a prime (312111210163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 399303 + ... + 885248.

It is an arithmetic number, because the mean of its divisors is an integer number (28902420000).

Almost surely, 2^312111210123 is an apocalyptic number.

312111210123 is a deficient number, since it is larger than the sum of its proper divisors (150327509877).

312111210123 is a wasteful number, since it uses less digits than its factorization.

312111210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293559 (or 1293553 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 312111210123 its reverse (321012111213), we get a palindrome (633123321336).

The spelling of 312111210123 in words is "three hundred twelve billion, one hundred eleven million, two hundred ten thousand, one hundred twenty-three".