221120606 has 16 divisors (see below), whose sum is σ = 382746624. Its totient is φ = 93845304.

The previous prime is 221120593. The next prime is 221120609. The reversal of 221120606 is 606021122.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221120609) 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 7 ways as a sum of consecutive naturals, for example, 75230 + ... + 78113.

It is an arithmetic number, because the mean of its divisors is an integer number (23921664).

Almost surely, 2^221120606 is an apocalyptic number.

221120606 is a deficient number, since it is larger than the sum of its proper divisors (161626018).

221120606 is a wasteful number, since it uses less digits than its factorization.

221120606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153455.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 221120606 is about 14870.1246127933. The cubic root of 221120606 is about 604.7043210597.

Adding to 221120606 its reverse (606021122), we get a palindrome (827141728).

The spelling of 221120606 in words is "two hundred twenty-one million, one hundred twenty thousand, six hundred six".