20001113111 has 4 divisors (see below), whose sum is σ = 22858414992. Its totient is φ = 17143811232.

The previous prime is 20001113089. The next prime is 20001113147. The reversal of 20001113111 is 11131110002.

It is a happy number.

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 20001113111 - 2²⁶ = 19934004247 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20001113092 and 20001113101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001119111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428650930 + ... + 1428650943.

It is an arithmetic number, because the mean of its divisors is an integer number (5714603748).

Almost surely, 2^20001113111 is an apocalyptic number.

20001113111 is a deficient number, since it is larger than the sum of its proper divisors (2857301881).

20001113111 is an equidigital number, since it uses as much as digits as its factorization.

20001113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2857301880.

The product of its (nonzero) digits is 6, while the sum is 11.

Adding to 20001113111 its reverse (11131110002), we get a palindrome (31132223113).

It can be divided in two parts, 2000 and 1113111, that added together give a palindrome (1115111).

The spelling of 20001113111 in words is "twenty billion, one million, one hundred thirteen thousand, one hundred eleven".