221181130 has 8 divisors (see below), whose sum is σ = 398126052. Its totient is φ = 88472448.

The previous prime is 221181127. The next prime is 221181131. The reversal of 221181130 is 31181122.

It can be written as a sum of positive squares in 2 ways, for example, as 213189201 + 7991929 = 14601^2 + 2827^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 221181098 and 221181107.

It is not an unprimeable number, because it can be changed into a prime (221181131) 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, 11059047 + ... + 11059066.

Almost surely, 2^221181130 is an apocalyptic number.

221181130 is a deficient number, since it is larger than the sum of its proper divisors (176944922).

221181130 is a wasteful number, since it uses less digits than its factorization.

221181130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22118120.

The product of its (nonzero) digits is 96, while the sum is 19.

The square root of 221181130 is about 14872.1595607363. The cubic root of 221181130 is about 604.7594882167.

The spelling of 221181130 in words is "two hundred twenty-one million, one hundred eighty-one thousand, one hundred thirty".