111001012020020 has 24 divisors (see below), whose sum is σ = 234147426261504. Its totient is φ = 44201299851936.

The previous prime is 111001012019987. The next prime is 111001012020071. The reversal of 111001012020020 is 20020210100111.

It is a junction number, because it is equal to n+sod(n) for n = 111001012019983 and 111001012020010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12444055184 + ... + 12444064103.

It is an arithmetic number, because the mean of its divisors is an integer number (9756142760896).

Almost surely, 2^{111001012020020} is an apocalyptic number.

111001012020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111001012020020 is an abundant number, since it is smaller than the sum of its proper divisors (123146414241484).

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

111001012020020 is a wasteful number, since it uses less digits than its factorization.

111001012020020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24888119519 (or 24888119517 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 111001012020020 its reverse (20020210100111), we get a palindrome (131021222120131).

The spelling of 111001012020020 in words is "one hundred eleven trillion, one billion, twelve million, twenty thousand, twenty".