20210020221191 has 2 divisors, whose sum is σ = 20210020221192. Its totient is φ = 20210020221190.

The previous prime is 20210020221187. The next prime is 20210020221227. The reversal of 20210020221191 is 19112202001202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20210020221191 - 2² = 20210020221187 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20210020221791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105010110595 + 10105010110596.

It is an arithmetic number, because the mean of its divisors is an integer number (10105010110596).

Almost surely, 2^{20210020221191} is an apocalyptic number.

20210020221191 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210020221191 is an equidigital number, since it uses as much as digits as its factorization.

20210020221191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 20210020221191 its reverse (19112202001202), we get a palindrome (39322222222393).

The spelling of 20210020221191 in words is "twenty trillion, two hundred ten billion, twenty million, two hundred twenty-one thousand, one hundred ninety-one".