312131230111133 has 4 divisors (see below), whose sum is σ = 312134157536640. Its totient is φ = 312128302685628.

The previous prime is 312131230111081. The next prime is 312131230111147. The reversal of 312131230111133 is 331111032131213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 312131230111133 - 2¹⁶ = 312131230045597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312131230111163) 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, 1463552813 + ... + 1463766066.

It is an arithmetic number, because the mean of its divisors is an integer number (78033539384160).

Almost surely, 2^{312131230111133} is an apocalyptic number.

It is an amenable number.

312131230111133 is a deficient number, since it is larger than the sum of its proper divisors (2927425507).

312131230111133 is a wasteful number, since it uses less digits than its factorization.

312131230111133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2927425506.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 312131230111133 its reverse (331111032131213), we get a palindrome (643242262242346).

The spelling of 312131230111133 in words is "three hundred twelve trillion, one hundred thirty-one billion, two hundred thirty million, one hundred eleven thousand, one hundred thirty-three".