20002211111191 has 2 divisors, whose sum is σ = 20002211111192. Its totient is φ = 20002211111190.

The previous prime is 20002211111189. The next prime is 20002211111213. The reversal of 20002211111191 is 19111111220002.

It is a happy number.

It is an a-pointer prime, because the next prime (20002211111213) can be obtained adding 20002211111191 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20002211111191 - 2¹ = 20002211111189 is a prime.

Together with 20002211111189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20002211111131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10001105555595 + 10001105555596.

It is an arithmetic number, because the mean of its divisors is an integer number (10001105555596).

Almost surely, 2^{20002211111191} is an apocalyptic number.

20002211111191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20002211111191 is an equidigital number, since it uses as much as digits as its factorization.

20002211111191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

Adding to 20002211111191 its reverse (19111111220002), we get a palindrome (39113322331193).

The spelling of 20002211111191 in words is "twenty trillion, two billion, two hundred eleven million, one hundred eleven thousand, one hundred ninety-one".