10021201221191 has 2 divisors, whose sum is σ = 10021201221192. Its totient is φ = 10021201221190.

The previous prime is 10021201221179. The next prime is 10021201221193. The reversal of 10021201221191 is 19112210212001.

It is a happy number.

10021201221191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10021201221191 - 2¹⁰ = 10021201220167 is a prime.

Together with 10021201221193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10021201221193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010600610595 + 5010600610596.

It is an arithmetic number, because the mean of its divisors is an integer number (5010600610596).

Almost surely, 2^{10021201221191} is an apocalyptic number.

10021201221191 is a deficient number, since it is larger than the sum of its proper divisors (1).

10021201221191 is an equidigital number, since it uses as much as digits as its factorization.

10021201221191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 23.

Adding to 10021201221191 its reverse (19112210212001), we get a palindrome (29133411433192).

The spelling of 10021201221191 in words is "ten trillion, twenty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred ninety-one".