20001119111 has 2 divisors, whose sum is σ = 20001119112. Its totient is φ = 20001119110.

The previous prime is 20001119081. The next prime is 20001119161. The reversal of 20001119111 is 11191110002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20001119111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20001119111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20001119161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000559555 + 10000559556.

It is an arithmetic number, because the mean of its divisors is an integer number (10000559556).

Almost surely, 2^20001119111 is an apocalyptic number.

20001119111 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001119111 is an equidigital number, since it uses as much as digits as its factorization.

20001119111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 17.

Adding to 20001119111 its reverse (11191110002), we get a palindrome (31192229113).

The spelling of 20001119111 in words is "twenty billion, one million, one hundred nineteen thousand, one hundred eleven".