111020100020020 has 48 divisors (see below), whose sum is σ = 238317385178880. Its totient is φ = 43423996352384.

The previous prime is 111020100019999. The next prime is 111020100020029. The reversal of 111020100020020 is 20020001020111.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 111020100019979 and 111020100020006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111020100020029) 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, 52206634 + ... + 54291553.

It is an arithmetic number, because the mean of its divisors is an integer number (4964945524560).

Almost surely, 2^{111020100020020} is an apocalyptic number.

111020100020020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111020100020020 is an abundant number, since it is smaller than the sum of its proper divisors (127297285158860).

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

111020100020020 is a wasteful number, since it uses less digits than its factorization.

111020100020020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106499352 (or 106499350 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 111020100020020 its reverse (20020001020111), we get a palindrome (131040101040131).

The spelling of 111020100020020 in words is "one hundred eleven trillion, twenty billion, one hundred million, twenty thousand, twenty".