312120123 has 32 divisors (see below), whose sum is σ = 490291200. Its totient is φ = 172886400.

The previous prime is 312120079. The next prime is 312120131. The reversal of 312120123 is 321021213.

It is not a de Polignac number, because 312120123 - 2²⁰ = 311071547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (312120173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 270598 + ... + 271748.

It is an arithmetic number, because the mean of its divisors is an integer number (15321600).

Almost surely, 2^312120123 is an apocalyptic number.

312120123 is a deficient number, since it is larger than the sum of its proper divisors (178171077).

312120123 is a wasteful number, since it uses less digits than its factorization.

312120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1547.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 312120123 is about 17666.9217182847. The cubic root of 312120123 is about 678.3293207019.

Adding to 312120123 its reverse (321021213), we get a palindrome (633141336).

The spelling of 312120123 in words is "three hundred twelve million, one hundred twenty thousand, one hundred twenty-three".