2160361221 has 4 divisors (see below), whose sum is σ = 2880481632. Its totient is φ = 1440240812.

The previous prime is 2160361193. The next prime is 2160361261. The reversal of 2160361221 is 1221630612.

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 2160361221 - 2¹⁸ = 2160099077 is a prime.

It is a super-2 number, since 2×2160361221² = 9334321210401221682, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2160361191 and 2160361200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2160361261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 360060201 + ... + 360060206.

It is an arithmetic number, because the mean of its divisors is an integer number (720120408).

Almost surely, 2^2160361221 is an apocalyptic number.

It is an amenable number.

2160361221 is a deficient number, since it is larger than the sum of its proper divisors (720120411).

2160361221 is an equidigital number, since it uses as much as digits as its factorization.

2160361221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720120410.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2160361221 is about 46479.6861112465. The cubic root of 2160361221 is about 1292.7328680632.

Adding to 2160361221 its reverse (1221630612), we get a palindrome (3381991833).

The spelling of 2160361221 in words is "two billion, one hundred sixty million, three hundred sixty-one thousand, two hundred twenty-one".