2180130221 has 4 divisors (see below), whose sum is σ = 2181555744. Its totient is φ = 2178704700.

The previous prime is 2180130157. The next prime is 2180130223. The reversal of 2180130221 is 1220310812.

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 2180130221 - 2⁶ = 2180130157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2180130193 and 2180130202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180130223) 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, 710465 + ... + 713526.

It is an arithmetic number, because the mean of its divisors is an integer number (545388936).

Almost surely, 2^2180130221 is an apocalyptic number.

It is an amenable number.

2180130221 is a deficient number, since it is larger than the sum of its proper divisors (1425523).

2180130221 is a wasteful number, since it uses less digits than its factorization.

2180130221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425522.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 2180130221 is about 46691.8646125853. The cubic root of 2180130221 is about 1296.6640744311.

The spelling of 2180130221 in words is "two billion, one hundred eighty million, one hundred thirty thousand, two hundred twenty-one".