2221202221 has 8 divisors (see below), whose sum is σ = 2551809024. Its totient is φ = 1893918480.

The previous prime is 2221202213. The next prime is 2221202231. The reversal of 2221202221 is 1222021222.

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

It is a cyclic number.

It is not a de Polignac number, because 2221202221 - 2³ = 2221202213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221202195 and 2221202204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221202231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 829330 + ... + 832003.

It is an arithmetic number, because the mean of its divisors is an integer number (318976128).

Almost surely, 2^2221202221 is an apocalyptic number.

It is an amenable number.

2221202221 is a deficient number, since it is larger than the sum of its proper divisors (330606803).

2221202221 is a wasteful number, since it uses less digits than its factorization.

2221202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1661531.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 2221202221 is about 47129.6320906497. The cubic root of 2221202221 is about 1304.7561913451.

Adding to 2221202221 its reverse (1222021222), we get a palindrome (3443223443).

The spelling of 2221202221 in words is "two billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty-one".