111001020020 has 48 divisors (see below), whose sum is σ = 263061993600. Its totient is φ = 38972142720.

The previous prime is 111001019999. The next prime is 111001020023. The reversal of 111001020020 is 20020100111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001020023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8692760 + ... + 8705519.

It is an arithmetic number, because the mean of its divisors is an integer number (5480458200).

Almost surely, 2^111001020020 is an apocalyptic number.

111001020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001020020 is an abundant number, since it is smaller than the sum of its proper divisors (152060973580).

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

111001020020 is a wasteful number, since it uses less digits than its factorization.

111001020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17398328 (or 17398326 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 111001020020 its reverse (20020100111), we get a palindrome (131021120131).

The spelling of 111001020020 in words is "one hundred eleven billion, one million, twenty thousand, twenty".