111020012200 has 96 divisors (see below), whose sum is σ = 263336103000. Its totient is φ = 43516339200.

The previous prime is 111020012189. The next prime is 111020012209. The reversal of 111020012200 is 2210020111.

It can be written as a sum of positive squares in 12 ways, for example, as 4246607556 + 106773404644 = 65166^2 + 326762^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (111020012209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3264886 + ... + 3298714.

Almost surely, 2^111020012200 is an apocalyptic number.

111020012200 is a gapful number since it is divisible by the number (10) 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 111020012200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131668051500).

111020012200 is an abundant number, since it is smaller than the sum of its proper divisors (152316090800).

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

111020012200 is a wasteful number, since it uses less digits than its factorization.

111020012200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34175 (or 34166 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111020012200 its reverse (2210020111), we get a palindrome (113230032311).

The spelling of 111020012200 in words is "one hundred eleven billion, twenty million, twelve thousand, two hundred".