221130404 has 18 divisors (see below), whose sum is σ = 425357142. Its totient is φ = 100513600.

The previous prime is 221130397. The next prime is 221130433. The reversal of 221130404 is 404031122.

221130404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 151240804 + 69889600 = 12298^2 + 8360^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227957 + ... + 228924.

Almost surely, 2^221130404 is an apocalyptic number.

It is an amenable number.

221130404 is a deficient number, since it is larger than the sum of its proper divisors (204226738).

221130404 is a wasteful number, since it uses less digits than its factorization.

221130404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456907 (or 456894 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 221130404 is about 14870.4540616620. The cubic root of 221130404 is about 604.7132525436.

Adding to 221130404 its reverse (404031122), we get a palindrome (625161526).

The spelling of 221130404 in words is "two hundred twenty-one million, one hundred thirty thousand, four hundred four".