111223312122 has 64 divisors (see below), whose sum is σ = 246292333056. Its totient is φ = 33268052160.

The previous prime is 111223312099. The next prime is 111223312139. The reversal of 111223312122 is 221213322111.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 629113 + ... + 786275.

It is an arithmetic number, because the mean of its divisors is an integer number (3848317704).

Almost surely, 2^111223312122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111223312122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123146166528).

111223312122 is an abundant number, since it is smaller than the sum of its proper divisors (135069020934).

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

111223312122 is a wasteful number, since it uses less digits than its factorization.

111223312122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157435.

The product of its digits is 288, while the sum is 21.

Adding to 111223312122 its reverse (221213322111), we get a palindrome (332436634233).

The spelling of 111223312122 in words is "one hundred eleven billion, two hundred twenty-three million, three hundred twelve thousand, one hundred twenty-two".