111220452 has 240 divisors, whose sum is σ = 365904000. Its totient is φ = 28740096.

The previous prime is 111220429. The next prime is 111220457. The reversal of 111220452 is 254022111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (111220457) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1249624 + ... + 1249712.

It is an arithmetic number, because the mean of its divisors is an integer number (1524600).

Almost surely, 2^111220452 is an apocalyptic number.

111220452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111220452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182952000).

111220452 is an abundant number, since it is smaller than the sum of its proper divisors (254683548).

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

111220452 is a wasteful number, since it uses less digits than its factorization.

111220452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 111220452 is about 10546.1107523105. The cubic root of 111220452 is about 480.9075019193.

Adding to 111220452 its reverse (254022111), we get a palindrome (365242563).

The spelling of 111220452 in words is "one hundred eleven million, two hundred twenty thousand, four hundred fifty-two".