2160007221 has 4 divisors (see below), whose sum is σ = 2880009632. Its totient is φ = 1440004812.

The previous prime is 2160007219. The next prime is 2160007253. The reversal of 2160007221 is 1227000612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2160007221 - 2¹ = 2160007219 is a prime.

It is a super-3 number, since 3×2160007221³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2160007021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360001201 + ... + 360001206.

It is an arithmetic number, because the mean of its divisors is an integer number (720002408).

Almost surely, 2^2160007221 is an apocalyptic number.

It is an amenable number.

2160007221 is a deficient number, since it is larger than the sum of its proper divisors (720002411).

2160007221 is an equidigital number, since it uses as much as digits as its factorization.

2160007221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720002410.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 2160007221 is about 46475.8778400150. The cubic root of 2160007221 is about 1292.6622544965.

Adding to 2160007221 its reverse (1227000612), we get a palindrome (3387007833).

The spelling of 2160007221 in words is "two billion, one hundred sixty million, seven thousand, two hundred twenty-one".