12111001303123 has 4 divisors (see below), whose sum is σ = 12748422424360. Its totient is φ = 11473580181888.

The previous prime is 12111001303111. The next prime is 12111001303151. The reversal of 12111001303123 is 32130310011121.

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

It is not a de Polignac number, because 12111001303123 - 2¹⁷ = 12111001172051 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: 637421121217 = 12111001303123 / (1 + 2 + 1 + 1 + 1 + 0 + 0 + 1 + 3 + 0 + 3 + 1 + 2 + 3).

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 12111001303123.

It is not an unprimeable number, because it can be changed into a prime (12111001303523) 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, 318710560590 + ... + 318710560627.

It is an arithmetic number, because the mean of its divisors is an integer number (3187105606090).

Almost surely, 2^{12111001303123} is an apocalyptic number.

12111001303123 is a deficient number, since it is larger than the sum of its proper divisors (637421121237).

12111001303123 is an equidigital number, since it uses as much as digits as its factorization.

12111001303123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637421121236.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 12111001303123 its reverse (32130310011121), we get a palindrome (44241311314244).

The spelling of 12111001303123 in words is "twelve trillion, one hundred eleven billion, one million, three hundred three thousand, one hundred twenty-three".