2020121220191 has 2 divisors, whose sum is σ = 2020121220192. Its totient is φ = 2020121220190.

The previous prime is 2020121220109. The next prime is 2020121220199. The reversal of 2020121220191 is 1910221210202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2020121220191 - 2³⁰ = 2019047478367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2020121220199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1010060610095 + 1010060610096.

It is an arithmetic number, because the mean of its divisors is an integer number (1010060610096).

Almost surely, 2^{2020121220191} is an apocalyptic number.

2020121220191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2020121220191 is an equidigital number, since it uses as much as digits as its factorization.

2020121220191 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2020121220191 its reverse (1910221210202), we get a palindrome (3930342430393).

The spelling of 2020121220191 in words is "two trillion, twenty billion, one hundred twenty-one million, two hundred twenty thousand, one hundred ninety-one".