312100321231 has 4 divisors (see below), whose sum is σ = 312112853712. Its totient is φ = 312087788752.

The previous prime is 312100321223. The next prime is 312100321289. The reversal of 312100321231 is 132123001213.

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

It is a cyclic number.

It is not a de Polignac number, because 312100321231 - 2³ = 312100321223 is a prime.

It is a super-2 number, since 2×312100321231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312100321199 and 312100321208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312100321201) 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, 6228811 + ... + 6278716.

It is an arithmetic number, because the mean of its divisors is an integer number (78028213428).

Almost surely, 2^312100321231 is an apocalyptic number.

312100321231 is a deficient number, since it is larger than the sum of its proper divisors (12532481).

312100321231 is a wasteful number, since it uses less digits than its factorization.

312100321231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12532480.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 312100321231 its reverse (132123001213), we get a palindrome (444223322444).

The spelling of 312100321231 in words is "three hundred twelve billion, one hundred million, three hundred twenty-one thousand, two hundred thirty-one".