221220110 has 8 divisors (see below), whose sum is σ = 398196216. Its totient is φ = 88488040.

The previous prime is 221220107. The next prime is 221220119. The reversal of 221220110 is 11022122.

It is a happy number.

221220110 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221220091 and 221220100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221220119) 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, 11060996 + ... + 11061015.

It is an arithmetic number, because the mean of its divisors is an integer number (49774527).

Almost surely, 2^221220110 is an apocalyptic number.

221220110 is a deficient number, since it is larger than the sum of its proper divisors (176976106).

221220110 is a wasteful number, since it uses less digits than its factorization.

221220110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22122018.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 221220110 is about 14873.4700053484. The cubic root of 221220110 is about 604.7950128569.

Adding to 221220110 its reverse (11022122), we get a palindrome (232242232).

It can be divided in two parts, 2212 and 20110, that added together give a palindrome (22322).

The spelling of 221220110 in words is "two hundred twenty-one million, two hundred twenty thousand, one hundred ten".