189911010201221 has 4 divisors (see below), whose sum is σ = 190582073841792. Its totient is φ = 189239946560652.

The previous prime is 189911010201193. The next prime is 189911010201233. The reversal of 189911010201221 is 122102010119981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189911010201221 - 2²⁶ = 189910943092357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189911010200221) 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 in 3 ways as a sum of consecutive naturals, for example, 335531819861 + ... + 335531820426.

It is an arithmetic number, because the mean of its divisors is an integer number (47645518460448).

Almost surely, 2^{189911010201221} is an apocalyptic number.

It is an amenable number.

189911010201221 is a deficient number, since it is larger than the sum of its proper divisors (671063640571).

189911010201221 is an equidigital number, since it uses as much as digits as its factorization.

189911010201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671063640570.

The product of its (nonzero) digits is 5184, while the sum is 38.

The spelling of 189911010201221 in words is "one hundred eighty-nine trillion, nine hundred eleven billion, ten million, two hundred one thousand, two hundred twenty-one".