11111222122 has 96 divisors (see below), whose sum is σ = 23528768256. Its totient is φ = 3822128640.

The previous prime is 11111222119. The next prime is 11111222123. The reversal of 11111222122 is 22122211111.

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 = 11111222096 and 11111222105.

It is not an unprimeable number, because it can be changed into a prime (11111222123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 495538 + ... + 517474.

It is an arithmetic number, because the mean of its divisors is an integer number (245091336).

Almost surely, 2^11111222122 is an apocalyptic number.

11111222122 is an abundant number, since it is smaller than the sum of its proper divisors (12417546134).

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

11111222122 is a wasteful number, since it uses less digits than its factorization.

11111222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22004 (or 21993 counting only the distinct ones).

The product of its digits is 32, while the sum is 16.

Adding to 11111222122 its reverse (22122211111), we get a palindrome (33233433233).

The spelling of 11111222122 in words is "eleven billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twenty-two".