20111401111 has 8 divisors (see below), whose sum is σ = 20359069200. Its totient is φ = 19864215360.

The previous prime is 20111401109. The next prime is 20111401309. The reversal of 20111401111 is 11110411102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20111401111 - 2¹ = 20111401109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20111401091 and 20111401100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111401811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36321 + ... + 203818.

It is an arithmetic number, because the mean of its divisors is an integer number (2544883650).

Almost surely, 2^20111401111 is an apocalyptic number.

20111401111 is a deficient number, since it is larger than the sum of its proper divisors (247668089).

20111401111 is an equidigital number, since it uses as much as digits as its factorization.

20111401111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241169.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 20111401111 its reverse (11110411102), we get a palindrome (31221812213).

Subtracting from 20111401111 its reverse (11110411102), we obtain a palindrome (9000990009).

The spelling of 20111401111 in words is "twenty billion, one hundred eleven million, four hundred one thousand, one hundred eleven".