12122312113 has 4 divisors (see below), whose sum is σ = 12760328560. Its totient is φ = 11484295668.

The previous prime is 12122312089. The next prime is 12122312117. The reversal of 12122312113 is 31121322121.

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 a de Polignac number, because none of the positive numbers 2^k-12122312113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 638016427 = 12122312113 / (1 + 2 + 1 + 2 + 2 + 3 + 1 + 2 + 1 + 1 + 3).

It is not an unprimeable number, because it can be changed into a prime (12122312117) 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, 319008195 + ... + 319008232.

It is an arithmetic number, because the mean of its divisors is an integer number (3190082140).

Almost surely, 2^12122312113 is an apocalyptic number.

It is an amenable number.

12122312113 is a deficient number, since it is larger than the sum of its proper divisors (638016447).

12122312113 is an equidigital number, since it uses as much as digits as its factorization.

12122312113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638016446.

The product of its digits is 144, while the sum is 19.

Adding to 12122312113 its reverse (31121322121), we get a palindrome (43243634234).

The spelling of 12122312113 in words is "twelve billion, one hundred twenty-two million, three hundred twelve thousand, one hundred thirteen".