111221022 has 64 divisors (see below), whose sum is σ = 257898240. Its totient is φ = 31885920.

The previous prime is 111220999. The next prime is 111221023. The reversal of 111221022 is 220122111.

It is a junction number, because it is equal to n+sod(n) for n = 111220989 and 111221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111221023) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151368 + ... + 152100.

It is an arithmetic number, because the mean of its divisors is an integer number (4029660).

Almost surely, 2^111221022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111221022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128949120).

111221022 is an abundant number, since it is smaller than the sum of its proper divisors (146677218).

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

111221022 is a wasteful number, since it uses less digits than its factorization.

111221022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 768 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 111221022 is about 10546.1377764564. The cubic root of 111221022 is about 480.9083234612.

Adding to 111221022 its reverse (220122111), we get a palindrome (331343133).

The spelling of 111221022 in words is "one hundred eleven million, two hundred twenty-one thousand, twenty-two".