111202020020 has 192 divisors, whose sum is σ = 294154291200. Its totient is φ = 35088754176.

The previous prime is 111202019983. The next prime is 111202020029. The reversal of 111202020020 is 20020202111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111202019983 and 111202020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202020029) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 33262469 + ... + 33265811.

It is an arithmetic number, because the mean of its divisors is an integer number (1532053600).

Almost surely, 2^111202020020 is an apocalyptic number.

111202020020 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 111202020020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147077145600).

111202020020 is an abundant number, since it is smaller than the sum of its proper divisors (182952271180).

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

111202020020 is a wasteful number, since it uses less digits than its factorization.

111202020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3759 (or 3743 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 111202020020 its reverse (20020202111), we get a palindrome (131222222131).

The spelling of 111202020020 in words is "one hundred eleven billion, two hundred two million, twenty thousand, twenty".