111101200020 has 192 divisors, whose sum is σ = 364267008000. Its totient is φ = 28034750592.

The previous prime is 111101199997. The next prime is 111101200037. The reversal of 111101200020 is 20002101111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111101199975 and 111101200011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9423049 + ... + 9434831.

It is an arithmetic number, because the mean of its divisors is an integer number (1897224000).

Almost surely, 2^111101200020 is an apocalyptic number.

111101200020 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 111101200020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182133504000).

111101200020 is an abundant number, since it is smaller than the sum of its proper divisors (253165807980).

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

111101200020 is a wasteful number, since it uses less digits than its factorization.

111101200020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12739 (or 12731 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 111101200020 its reverse (20002101111), we get a palindrome (131103301131).

The spelling of 111101200020 in words is "one hundred eleven billion, one hundred one million, two hundred thousand, twenty".