20110212101191 has 2 divisors, whose sum is σ = 20110212101192. Its totient is φ = 20110212101190.

The previous prime is 20110212101159. The next prime is 20110212101197. The reversal of 20110212101191 is 19110121201102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20110212101191 - 2⁵ = 20110212101159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20110212101197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10055106050595 + 10055106050596.

It is an arithmetic number, because the mean of its divisors is an integer number (10055106050596).

Almost surely, 2^{20110212101191} is an apocalyptic number.

20110212101191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20110212101191 is an equidigital number, since it uses as much as digits as its factorization.

20110212101191 is an evil number, because the sum of its binary digits is even.

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

Adding to 20110212101191 its reverse (19110121201102), we get a palindrome (39220333302293).

The spelling of 20110212101191 in words is "twenty trillion, one hundred ten billion, two hundred twelve million, one hundred one thousand, one hundred ninety-one".