111101100020 has 24 divisors (see below), whose sum is σ = 233320817184. Its totient is φ = 44438819616.

The previous prime is 111101100017. The next prime is 111101100041. The reversal of 111101100020 is 20001101111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111101099980 and 111101100007.

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, 569219 + ... + 739061.

It is an arithmetic number, because the mean of its divisors is an integer number (9721700716).

Almost surely, 2^111101100020 is an apocalyptic number.

111101100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111101100020 is an abundant number, since it is smaller than the sum of its proper divisors (122219717164).

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

111101100020 is a wasteful number, since it uses less digits than its factorization.

111101100020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202559 (or 202557 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 111101100020 its reverse (20001101111), we get a palindrome (131102201131).

The spelling of 111101100020 in words is "one hundred eleven billion, one hundred one million, one hundred thousand, twenty".