111001002000020 has 96 divisors (see below), whose sum is σ = 266815452024576. Its totient is φ = 38395734220800.

The previous prime is 111001001999999. The next prime is 111001002000029. The reversal of 111001002000020 is 20000200100111.

It is a junction number, because it is equal to n+sod(n) for n = 111001001999971 and 111001002000007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111001002000029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59683469 + ... + 61515188.

It is an arithmetic number, because the mean of its divisors is an integer number (2779327625256).

Almost surely, 2^{111001002000020} is an apocalyptic number.

111001002000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001002000020 is an abundant number, since it is smaller than the sum of its proper divisors (155814450024556).

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

111001002000020 is a wasteful number, since it uses less digits than its factorization.

111001002000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121198881 (or 121198879 counting only the distinct ones).

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

Adding to 111001002000020 its reverse (20000200100111), we get a palindrome (131001202100131).

The spelling of 111001002000020 in words is "one hundred eleven trillion, one billion, two million, twenty", and thus it is an aban number.