2201212221 has 8 divisors (see below), whose sum is σ = 3160715040. Its totient is φ = 1354592112.

The previous prime is 2201212151. The next prime is 2201212231. The reversal of 2201212221 is 1222121022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2201212221 - 2⁷ = 2201212093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2201212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201212231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28220631 + ... + 28220708.

It is an arithmetic number, because the mean of its divisors is an integer number (395089380).

Almost surely, 2^2201212221 is an apocalyptic number.

It is an amenable number.

2201212221 is a deficient number, since it is larger than the sum of its proper divisors (959502819).

2201212221 is a wasteful number, since it uses less digits than its factorization.

2201212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56441355.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 2201212221 is about 46917.0781379233. The cubic root of 2201212221 is about 1300.8302824238.

Adding to 2201212221 its reverse (1222121022), we get a palindrome (3423333243).

The spelling of 2201212221 in words is "two billion, two hundred one million, two hundred twelve thousand, two hundred twenty-one".