111100101820 has 24 divisors (see below), whose sum is σ = 245589699600. Its totient is φ = 42101091072.

The previous prime is 111100101817. The next prime is 111100101829. The reversal of 111100101820 is 28101001111.

It is a junction number, because it is equal to n+sod(n) for n = 111100101794 and 111100101803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100101829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146183965 + ... + 146184724.

It is an arithmetic number, because the mean of its divisors is an integer number (10232904150).

Almost surely, 2^111100101820 is an apocalyptic number.

111100101820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111100101820 is an abundant number, since it is smaller than the sum of its proper divisors (134489597780).

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

111100101820 is a wasteful number, since it uses less digits than its factorization.

111100101820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292368717 (or 292368715 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 111100101820 its reverse (28101001111), we get a palindrome (139201102931).

The spelling of 111100101820 in words is "one hundred eleven billion, one hundred million, one hundred one thousand, eight hundred twenty".