111102202120 has 192 divisors, whose sum is σ = 315026938800. Its totient is φ = 35160652800.

The previous prime is 111102202097. The next prime is 111102202129. The reversal of 111102202120 is 21202201111.

It can be written as a sum of positive squares in 8 ways, for example, as 7030151716 + 104072050404 = 83846^2 + 322602^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 111102202120.

It is not an unprimeable number, because it can be changed into a prime (111102202129) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4293220 + ... + 4319020.

Almost surely, 2^111102202120 is an apocalyptic number.

111102202120 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 111102202120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157513469400).

111102202120 is an abundant number, since it is smaller than the sum of its proper divisors (203924736680).

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

111102202120 is a wasteful number, since it uses less digits than its factorization.

111102202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25865 (or 25828 counting only the distinct ones).

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

Adding to 111102202120 its reverse (21202201111), we get a palindrome (132304403231).

The spelling of 111102202120 in words is "one hundred eleven billion, one hundred two million, two hundred two thousand, one hundred twenty".