201164221 has 4 divisors (see below), whose sum is σ = 201197344. Its totient is φ = 201131100.

The previous prime is 201164219. The next prime is 201164231. The reversal of 201164221 is 122461102.

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 201164221 - 2¹ = 201164219 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 (201164231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4545 + ... + 20566.

It is an arithmetic number, because the mean of its divisors is an integer number (50299336).

Almost surely, 2^201164221 is an apocalyptic number.

It is an amenable number.

201164221 is a deficient number, since it is larger than the sum of its proper divisors (33123).

201164221 is an equidigital number, since it uses as much as digits as its factorization.

201164221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33122.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 201164221 is about 14183.2373243911. The cubic root of 201164221 is about 585.9360872182.

It can be divided in two parts, 20 and 1164221, that added together give a square (1164241 = 1079²).

The spelling of 201164221 in words is "two hundred one million, one hundred sixty-four thousand, two hundred twenty-one".