221120021191 has 2 divisors, whose sum is σ = 221120021192. Its totient is φ = 221120021190.

The previous prime is 221120021153. The next prime is 221120021219. The reversal of 221120021191 is 191120021122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221120021191 - 2¹¹ = 221120019143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221120021491) 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, 110560010595 + 110560010596.

It is an arithmetic number, because the mean of its divisors is an integer number (110560010596).

Almost surely, 2^221120021191 is an apocalyptic number.

221120021191 is a deficient number, since it is larger than the sum of its proper divisors (1).

221120021191 is an equidigital number, since it uses as much as digits as its factorization.

221120021191 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 221120021191 in words is "two hundred twenty-one billion, one hundred twenty million, twenty-one thousand, one hundred ninety-one".