2202211221 has 16 divisors (see below), whose sum is σ = 3401721984. Its totient is φ = 1241167104.

The previous prime is 2202211097. The next prime is 2202211241. The reversal of 2202211221 is 1221122022.

It is a de Polignac number, because none of the positive numbers 2^k-2202211221 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2202211221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2202211241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 716736 + ... + 719801.

It is an arithmetic number, because the mean of its divisors is an integer number (212607624).

Almost surely, 2^2202211221 is an apocalyptic number.

2202211221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2202211221 is a deficient number, since it is larger than the sum of its proper divisors (1199510763).

2202211221 is a wasteful number, since it uses less digits than its factorization.

2202211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436620.

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

The square root of 2202211221 is about 46927.7233732897. The cubic root of 2202211221 is about 1301.0270426296.

Adding to 2202211221 its reverse (1221122022), we get a palindrome (3423333243).

The spelling of 2202211221 in words is "two billion, two hundred two million, two hundred eleven thousand, two hundred twenty-one".