312043121 has 12 divisors (see below), whose sum is σ = 343443420. Its totient is φ = 283308480.

The previous prime is 312043111. The next prime is 312043133. The reversal of 312043121 is 121340213.

It can be written as a sum of positive squares in 6 ways, for example, as 75498721 + 236544400 = 8689^2 + 15380^2 .

It is not a de Polignac number, because 312043121 - 2⁶ = 312043057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 312043121.

It is not an unprimeable number, because it can be changed into a prime (312043111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4826 + ... + 25443.

It is an arithmetic number, because the mean of its divisors is an integer number (28620285).

Almost surely, 2^312043121 is an apocalyptic number.

It is an amenable number.

312043121 is a deficient number, since it is larger than the sum of its proper divisors (31400299).

312043121 is a wasteful number, since it uses less digits than its factorization.

312043121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30356 (or 30343 counting only the distinct ones).

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

The square root of 312043121 is about 17664.7423134333. The cubic root of 312043121 is about 678.2735334089.

Adding to 312043121 its reverse (121340213), we get a palindrome (433383334).

The spelling of 312043121 in words is "three hundred twelve million, forty-three thousand, one hundred twenty-one".