11222222122 has 4 divisors (see below), whose sum is σ = 16833333186. Its totient is φ = 5611111060.

The previous prime is 11222222113. The next prime is 11222222147. The reversal of 11222222122 is 22122222211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22122222211 = 47123 ⋅469457.

It can be written as a sum of positive squares in only one way, i.e., 9469041481 + 1753180641 = 97309^2 + 41871^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 11222222122.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2805555529 + ... + 2805555532.

Almost surely, 2^11222222122 is an apocalyptic number.

11222222122 is a deficient number, since it is larger than the sum of its proper divisors (5611111064).

11222222122 is an equidigital number, since it uses as much as digits as its factorization.

11222222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5611111063.

The product of its digits is 256, while the sum is 19.

Adding to 11222222122 its reverse (22122222211), we get a palindrome (33344444333).

The spelling of 11222222122 in words is "eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-two".