221213330 has 16 divisors (see below), whose sum is σ = 428813784. Its totient is φ = 81678720.

The previous prime is 221213329. The next prime is 221213353. The reversal of 221213330 is 33312122.

It can be written as a sum of positive squares in 4 ways, for example, as 202749121 + 18464209 = 14239^2 + 4297^2 .

It is a junction number, because it is equal to n+sod(n) for n = 221213299 and 221213308.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 850691 + ... + 850950.

Almost surely, 2^221213330 is an apocalyptic number.

221213330 is a deficient number, since it is larger than the sum of its proper divisors (207600454).

221213330 is a wasteful number, since it uses less digits than its factorization.

221213330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1701661.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 221213330 is about 14873.2420809990. The cubic root of 221213330 is about 604.7888341659.

Adding to 221213330 its reverse (33312122), we get a palindrome (254525452).

The spelling of 221213330 in words is "two hundred twenty-one million, two hundred thirteen thousand, three hundred thirty".