2160231221 has 4 divisors (see below), whose sum is σ = 2187576000. Its totient is φ = 2132886444.

The previous prime is 2160231197. The next prime is 2160231263. The reversal of 2160231221 is 1221320612.

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 a cyclic number.

It is not a de Polignac number, because 2160231221 - 2¹⁰ = 2160230197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2160231193 and 2160231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2160230221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13672271 + ... + 13672428.

It is an arithmetic number, because the mean of its divisors is an integer number (546894000).

Almost surely, 2^2160231221 is an apocalyptic number.

It is an amenable number.

2160231221 is a deficient number, since it is larger than the sum of its proper divisors (27344779).

2160231221 is an equidigital number, since it uses as much as digits as its factorization.

2160231221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27344778.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 2160231221 is about 46478.2876298170. The cubic root of 2160231221 is about 1292.7069374237.

Adding to 2160231221 its reverse (1221320612), we get a palindrome (3381551833).

The spelling of 2160231221 in words is "two billion, one hundred sixty million, two hundred thirty-one thousand, two hundred twenty-one".