312101011231 has 4 divisors (see below), whose sum is σ = 312102159912. Its totient is φ = 312099862552.

The previous prime is 312101011207. The next prime is 312101011307. The reversal of 312101011231 is 132110101213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 312101011231 - 2²¹ = 312098914079 is a prime.

It is a super-2 number, since 2×312101011231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312101011031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87240 + ... + 794866.

It is an arithmetic number, because the mean of its divisors is an integer number (78025539978).

Almost surely, 2^312101011231 is an apocalyptic number.

312101011231 is a deficient number, since it is larger than the sum of its proper divisors (1148681).

312101011231 is an equidigital number, since it uses as much as digits as its factorization.

312101011231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148680.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 312101011231 its reverse (132110101213), we get a palindrome (444211112444).

It can be divided in two parts, 31210 and 1011231, that added together give a square (1042441 = 1021²).

The spelling of 312101011231 in words is "three hundred twelve billion, one hundred one million, eleven thousand, two hundred thirty-one".