312120011113 has 4 divisors (see below), whose sum is σ = 315626977620. Its totient is φ = 308613044608.

The previous prime is 312120011083. The next prime is 312120011123. The reversal of 312120011113 is 311110021213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311110021213 = 59 ⋅5273051207.

It can be written as a sum of positive squares in 2 ways, for example, as 81132116569 + 230987894544 = 284837^2 + 480612^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312120011113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312120011123) 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, 1753483120 + ... + 1753483297.

It is an arithmetic number, because the mean of its divisors is an integer number (78906744405).

Almost surely, 2^312120011113 is an apocalyptic number.

It is an amenable number.

312120011113 is a deficient number, since it is larger than the sum of its proper divisors (3506966507).

312120011113 is an equidigital number, since it uses as much as digits as its factorization.

312120011113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3506966506.

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

Adding to 312120011113 its reverse (311110021213), we get a palindrome (623230032326).

It can be divided in two parts, 3121200 and 11113, that added together give a palindrome (3132313).

The spelling of 312120011113 in words is "three hundred twelve billion, one hundred twenty million, eleven thousand, one hundred thirteen".