11222123121 has 24 divisors (see below), whose sum is σ = 18614051040. Its totient is φ = 6443323200.

The previous prime is 11222123117. The next prime is 11222123137. The reversal of 11222123121 is 12132122211.

It is not a de Polignac number, because 11222123121 - 2² = 11222123117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11222123094 and 11222123103.

It is not an unprimeable number, because it can be changed into a prime (11222123111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2981140 + ... + 2984901.

It is an arithmetic number, because the mean of its divisors is an integer number (775585460).

Almost surely, 2^11222123121 is an apocalyptic number.

11222123121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11222123121 is a deficient number, since it is larger than the sum of its proper divisors (7391927919).

11222123121 is a wasteful number, since it uses less digits than its factorization.

11222123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5966077 (or 5966074 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 11222123121 its reverse (12132122211), we get a palindrome (23354245332).

The spelling of 11222123121 in words is "eleven billion, two hundred twenty-two million, one hundred twenty-three thousand, one hundred twenty-one".