2221245221 has 8 divisors (see below), whose sum is σ = 2393013504. Its totient is φ = 2049606000.

The previous prime is 2221245197. The next prime is 2221245251. The reversal of 2221245221 is 1225421222.

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

It is not a de Polignac number, because 2221245221 - 2¹⁰ = 2221244197 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 (2221245251) 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, 5096 + ... + 66846.

It is an arithmetic number, because the mean of its divisors is an integer number (299126688).

Almost surely, 2^2221245221 is an apocalyptic number.

It is an amenable number.

2221245221 is a deficient number, since it is larger than the sum of its proper divisors (171768283).

2221245221 is a wasteful number, since it uses less digits than its factorization.

2221245221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64531.

The product of its digits is 1280, while the sum is 23.

The square root of 2221245221 is about 47130.0882770232. The cubic root of 2221245221 is about 1304.7646108328.

Adding to 2221245221 its reverse (1225421222), we get a palindrome (3446666443).

The spelling of 2221245221 in words is "two billion, two hundred twenty-one million, two hundred forty-five thousand, two hundred twenty-one".