20112000111 has 64 divisors (see below), whose sum is σ = 34450391040. Its totient is φ = 11358597600.

The previous prime is 20112000091. The next prime is 20112000133. The reversal of 20112000111 is 11100021102.

It is a happy number.

It is not a de Polignac number, because 20112000111 - 2¹¹ = 20111998063 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 = 20112000093 and 20112000102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20112000191) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19135536 + ... + 19136586.

It is an arithmetic number, because the mean of its divisors is an integer number (538287360).

Almost surely, 2^20112000111 is an apocalyptic number.

20112000111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20112000111 is a deficient number, since it is larger than the sum of its proper divisors (14338390929).

20112000111 is a wasteful number, since it uses less digits than its factorization.

20112000111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 20112000111 its reverse (11100021102), we get a palindrome (31212021213).

The spelling of 20112000111 in words is "twenty billion, one hundred twelve million, one hundred eleven", and thus it is an aban number.