11222122122 has 48 divisors (see below), whose sum is σ = 24584096160. Its totient is φ = 3699367776.

The previous prime is 11222122117. The next prime is 11222122151. The reversal of 11222122122 is 22122122211.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 11222122095 and 11222122104.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1187488 + ... + 1196900.

It is an arithmetic number, because the mean of its divisors is an integer number (512168670).

Almost surely, 2^11222122122 is an apocalyptic number.

11222122122 is an abundant number, since it is smaller than the sum of its proper divisors (13361974038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11222122122 is a wasteful number, since it uses less digits than its factorization.

11222122122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10147 (or 10144 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 11222122122 its reverse (22122122211), we get a palindrome (33344244333).

The spelling of 11222122122 in words is "eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-two".