312331121 has 8 divisors (see below), whose sum is σ = 319261824. Its totient is φ = 305412400.

The previous prime is 312331109. The next prime is 312331133. The reversal of 312331121 is 121133213.

It is an interprime number because it is at equal distance from previous prime (312331109) and next prime (312331133).

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 312331121 - 2⁶ = 312331057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 312331121.

It is not an unprimeable number, because it can be changed into a prime (312351121) 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, 67946 + ... + 72396.

It is an arithmetic number, because the mean of its divisors is an integer number (39907728).

Almost surely, 2^312331121 is an apocalyptic number.

It is an amenable number.

312331121 is a deficient number, since it is larger than the sum of its proper divisors (6930703).

312331121 is a wasteful number, since it uses less digits than its factorization.

312331121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5991.

The product of its digits is 108, while the sum is 17.

The square root of 312331121 is about 17672.8922647087. The cubic root of 312331121 is about 678.4821399530.

Adding to 312331121 its reverse (121133213), we get a palindrome (433464334).

The spelling of 312331121 in words is "three hundred twelve million, three hundred thirty-one thousand, one hundred twenty-one".