111012201220 has 24 divisors (see below), whose sum is σ = 233817404184. Its totient is φ = 44273112576.

The previous prime is 111012201203. The next prime is 111012201221. The reversal of 111012201220 is 22102210111.

It can be written as a sum of positive squares in 4 ways, for example, as 3647193664 + 107365007556 = 60392^2 + 327666^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 111012201220.

It is not an unprimeable number, because it can be changed into a prime (111012201221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8228587 + ... + 8242066.

It is an arithmetic number, because the mean of its divisors is an integer number (9742391841).

Almost surely, 2^111012201220 is an apocalyptic number.

111012201220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111012201220 is an abundant number, since it is smaller than the sum of its proper divisors (122805202964).

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

111012201220 is a wasteful number, since it uses less digits than its factorization.

111012201220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16470999 (or 16470997 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 111012201220 its reverse (22102210111), we get a palindrome (133114411331).

The spelling of 111012201220 in words is "one hundred eleven billion, twelve million, two hundred one thousand, two hundred twenty".