312340113221131 has 4 divisors (see below), whose sum is σ = 312835105477264. Its totient is φ = 311845120965000.

The previous prime is 312340113221093. The next prime is 312340113221141. The reversal of 312340113221131 is 131122311043213.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312340113221131 is a prime.

It is a super-2 number, since 2×312340113221131² (a number of 30 digits) contains 22 as substring.

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 312340113221131.

It is not an unprimeable number, because it can be changed into a prime (312340113221141) 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, 247496127120 + ... + 247496128381.

It is an arithmetic number, because the mean of its divisors is an integer number (78208776369316).

Almost surely, 2^{312340113221131} is an apocalyptic number.

312340113221131 is a deficient number, since it is larger than the sum of its proper divisors (494992256133).

312340113221131 is an equidigital number, since it uses as much as digits as its factorization.

312340113221131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494992256132.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 312340113221131 its reverse (131122311043213), we get a palindrome (443462424264344).

The spelling of 312340113221131 in words is "three hundred twelve trillion, three hundred forty billion, one hundred thirteen million, two hundred twenty-one thousand, one hundred thirty-one".