100020111 has 4 divisors (see below), whose sum is σ = 133360152. Its totient is φ = 66680072.

The previous prime is 100020103. The next prime is 100020113. The reversal of 100020111 is 111020001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100020111 - 2³ = 100020103 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100020111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100020113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16670016 + ... + 16670021.

It is an arithmetic number, because the mean of its divisors is an integer number (33340038).

Almost surely, 2^100020111 is an apocalyptic number.

100020111 is a deficient number, since it is larger than the sum of its proper divisors (33340041).

100020111 is an equidigital number, since it uses as much as digits as its factorization.

100020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33340040.

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

The square root of 100020111 is about 10001.0054994485. The cubic root of 100020111 is about 464.1899969400.

Adding to 100020111 its reverse (111020001), we get a palindrome (211040112).

The spelling of 100020111 in words is "one hundred million, twenty thousand, one hundred eleven".