11222123123 has 4 divisors (see below), whose sum is σ = 11224990560. Its totient is φ = 11219255688.

The previous prime is 11222123117. The next prime is 11222123137. The reversal of 11222123123 is 32132122211.

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

It is a cyclic number.

It is not a de Polignac number, because 11222123123 - 2¹⁰ = 11222122099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11222123095 and 11222123104.

It is not an unprimeable number, because it can be changed into a prime (11222123153) 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, 1427840 + ... + 1435677.

It is an arithmetic number, because the mean of its divisors is an integer number (2806247640).

Almost surely, 2^11222123123 is an apocalyptic number.

11222123123 is a deficient number, since it is larger than the sum of its proper divisors (2867437).

11222123123 is an equidigital number, since it uses as much as digits as its factorization.

11222123123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2867436.

The product of its digits is 288, while the sum is 20.

Adding to 11222123123 its reverse (32132122211), we get a palindrome (43354245334).

The spelling of 11222123123 in words is "eleven billion, two hundred twenty-two million, one hundred twenty-three thousand, one hundred twenty-three".