2201220221 has 16 divisors (see below), whose sum is σ = 2348631936. Its totient is φ = 2058403776.

The previous prime is 2201220199. The next prime is 2201220233. The reversal of 2201220221 is 1220221022.

It is a cyclic number.

It is not a de Polignac number, because 2201220221 - 2¹⁸ = 2200958077 is a prime.

It is a super-2 number, since 2×2201220221² = 9690740922678577682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2201220196 and 2201220205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201220121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354086 + ... + 360248.

It is an arithmetic number, because the mean of its divisors is an integer number (146789496).

Almost surely, 2^2201220221 is an apocalyptic number.

It is an amenable number.

2201220221 is a deficient number, since it is larger than the sum of its proper divisors (147411715).

2201220221 is a wasteful number, since it uses less digits than its factorization.

2201220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6532.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2201220221 is about 46917.1633946470. The cubic root of 2201220221 is about 1300.8318583176.

Adding to 2201220221 its reverse (1220221022), we get a palindrome (3421441243).

The spelling of 2201220221 in words is "two billion, two hundred one million, two hundred twenty thousand, two hundred twenty-one".