312120223 has 4 divisors (see below), whose sum is σ = 312865560. Its totient is φ = 311374888.

The previous prime is 312120217. The next prime is 312120229. The reversal of 312120223 is 322021213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322021213 = 15199 ⋅21187.

It is an interprime number because it is at equal distance from previous prime (312120217) and next prime (312120229).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312120223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312120197 and 312120206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312120229) 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, 372040 + ... + 372877.

It is an arithmetic number, because the mean of its divisors is an integer number (78216390).

Almost surely, 2^312120223 is an apocalyptic number.

312120223 is a deficient number, since it is larger than the sum of its proper divisors (745337).

312120223 is an equidigital number, since it uses as much as digits as its factorization.

312120223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745336.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 312120223 is about 17666.9245484323. The cubic root of 312120223 is about 678.3293931451.

Adding to 312120223 its reverse (322021213), we get a palindrome (634141436).

The spelling of 312120223 in words is "three hundred twelve million, one hundred twenty thousand, two hundred twenty-three".