312345121 has 8 divisors (see below), whose sum is σ = 342205344. Its totient is φ = 282729120.

The previous prime is 312345107. The next prime is 312345133. The reversal of 312345121 is 121543213.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 312345121 - 2¹⁵ = 312312353 is a prime.

It is a super-2 number, since 2×312345121² = 195118949225009282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312345092 and 312345101.

It is not an unprimeable number, because it can be changed into a prime (312345521) 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, 58371 + ... + 63496.

It is an arithmetic number, because the mean of its divisors is an integer number (42775668).

Almost surely, 2^312345121 is an apocalyptic number.

It is an amenable number.

312345121 is a deficient number, since it is larger than the sum of its proper divisors (29860223).

312345121 is a wasteful number, since it uses less digits than its factorization.

312345121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122111.

The product of its digits is 720, while the sum is 22.

The square root of 312345121 is about 17673.2883471073. The cubic root of 312345121 is about 678.4922772799.

Adding to 312345121 its reverse (121543213), we get a palindrome (433888334).

The spelling of 312345121 in words is "three hundred twelve million, three hundred forty-five thousand, one hundred twenty-one".