100111020 has 24 divisors (see below), whose sum is σ = 280311024. Its totient is φ = 26696256.

The previous prime is 100111007. The next prime is 100111043. The reversal of 100111020 is 20111001.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

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, 834199 + ... + 834318.

It is an arithmetic number, because the mean of its divisors is an integer number (11679626).

Almost surely, 2^100111020 is an apocalyptic number.

100111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100111020 is an abundant number, since it is smaller than the sum of its proper divisors (180200004).

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

100111020 is a wasteful number, since it uses less digits than its factorization.

100111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668529 (or 1668527 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 100111020 is about 10005.5494601746. The cubic root of 100111020 is about 464.3305895650.

Adding to 100111020 its reverse (20111001), we get a palindrome (120222021).

It can be divided in two parts, 1001 and 11020, that added together give a palindrome (12021).

The spelling of 100111020 in words is "one hundred million, one hundred eleven thousand, twenty".