312223121 has 8 divisors (see below), whose sum is σ = 356940480. Its totient is φ = 267534288.

The previous prime is 312223081. The next prime is 312223123. The reversal of 312223121 is 121322213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312223121 - 2¹⁴ = 312206737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 312223121.

It is not an unprimeable number, because it can be changed into a prime (312223123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27650 + ... + 37268.

It is an arithmetic number, because the mean of its divisors is an integer number (44617560).

Almost surely, 2^312223121 is an apocalyptic number.

It is an amenable number.

312223121 is a deficient number, since it is larger than the sum of its proper divisors (44717359).

312223121 is an equidigital number, since it uses as much as digits as its factorization.

312223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14263.

The product of its digits is 144, while the sum is 17.

The square root of 312223121 is about 17669.8364734935. The cubic root of 312223121 is about 678.4039275327.

Adding to 312223121 its reverse (121322213), we get a palindrome (433545334).

It can be divided in two parts, 31222 and 3121, that added together give a palindrome (34343).

The spelling of 312223121 in words is "three hundred twelve million, two hundred twenty-three thousand, one hundred twenty-one".