111101121222 has 128 divisors (see below), whose sum is σ = 283021820928. Its totient is φ = 28291161600.

The previous prime is 111101121143. The next prime is 111101121239. The reversal of 111101121222 is 222121101111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2625472 + ... + 2667452.

It is an arithmetic number, because the mean of its divisors is an integer number (2211107976).

Almost surely, 2^111101121222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111101121222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141510910464).

111101121222 is an abundant number, since it is smaller than the sum of its proper divisors (171920699706).

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

111101121222 is a wasteful number, since it uses less digits than its factorization.

111101121222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42174.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 111101121222 its reverse (222121101111), we get a palindrome (333222222333).

The spelling of 111101121222 in words is "one hundred eleven billion, one hundred one million, one hundred twenty-one thousand, two hundred twenty-two".