312423121 has 4 divisors (see below), whose sum is σ = 312718644. Its totient is φ = 312127600.

The previous prime is 312423109. The next prime is 312423131. The reversal of 312423121 is 121324213.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 100400400 + 212022721 = 10020^2 + 14561^2 .

It is a cyclic number.

It is not a de Polignac number, because 312423121 - 2¹⁹ = 311898833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312423101) 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, 146170 + ... + 148291.

It is an arithmetic number, because the mean of its divisors is an integer number (78179661).

Almost surely, 2^312423121 is an apocalyptic number.

It is an amenable number.

312423121 is a deficient number, since it is larger than the sum of its proper divisors (295523).

312423121 is a wasteful number, since it uses less digits than its factorization.

312423121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295522.

The product of its digits is 288, while the sum is 19.

The square root of 312423121 is about 17675.4949294214. The cubic root of 312423121 is about 678.5487511282.

Adding to 312423121 its reverse (121324213), we get a palindrome (433747334).

The spelling of 312423121 in words is "three hundred twelve million, four hundred twenty-three thousand, one hundred twenty-one".