111100020111 has 12 divisors (see below), whose sum is σ = 167455103088. Its totient is φ = 70846389504.

The previous prime is 111100020103. The next prime is 111100020113. The reversal of 111100020111 is 111020001111.

It is not a de Polignac number, because 111100020111 - 2³ = 111100020103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 111100020093 and 111100020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111100020113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268357330 + ... + 268357743.

It is an arithmetic number, because the mean of its divisors is an integer number (13954591924).

Almost surely, 2^111100020111 is an apocalyptic number.

111100020111 is a deficient number, since it is larger than the sum of its proper divisors (56355082977).

111100020111 is a wasteful number, since it uses less digits than its factorization.

111100020111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536715102 (or 536715099 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 111100020111 its reverse (111020001111), we get a palindrome (222120021222).

The spelling of 111100020111 in words is "one hundred eleven billion, one hundred million, twenty thousand, one hundred eleven".