21112020020191 has 2 divisors, whose sum is σ = 21112020020192. Its totient is φ = 21112020020190.

The previous prime is 21112020020167. The next prime is 21112020020209. The reversal of 21112020020191 is 19102002021112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21112020020191 - 2¹⁵ = 21112019987423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112020020891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556010010095 + 10556010010096.

It is an arithmetic number, because the mean of its divisors is an integer number (10556010010096).

Almost surely, 2^{21112020020191} is an apocalyptic number.

21112020020191 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112020020191 is an equidigital number, since it uses as much as digits as its factorization.

21112020020191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21112020020191 in words is "twenty-one trillion, one hundred twelve billion, twenty million, twenty thousand, one hundred ninety-one".