11121315123 has 4 divisors (see below), whose sum is σ = 14828420168. Its totient is φ = 7414210080.

The previous prime is 11121315113. The next prime is 11121315211. The reversal of 11121315123 is 32151312111.

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

It is not a de Polignac number, because 11121315123 - 2⁵ = 11121315091 is a prime.

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 11121315123.

It is not an unprimeable number, because it can be changed into a prime (11121315113) 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, 1853552518 + ... + 1853552523.

It is an arithmetic number, because the mean of its divisors is an integer number (3707105042).

Almost surely, 2^11121315123 is an apocalyptic number.

11121315123 is a deficient number, since it is larger than the sum of its proper divisors (3707105045).

11121315123 is an equidigital number, since it uses as much as digits as its factorization.

11121315123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707105044.

The product of its digits is 180, while the sum is 21.

Adding to 11121315123 its reverse (32151312111), we get a palindrome (43272627234).

The spelling of 11121315123 in words is "eleven billion, one hundred twenty-one million, three hundred fifteen thousand, one hundred twenty-three".