221120210 has 32 divisors (see below), whose sum is σ = 416102400. Its totient is φ = 84502080.

The previous prime is 221120197. The next prime is 221120219. The reversal of 221120210 is 12021122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221120191 and 221120200.

It is not an unprimeable number, because it can be changed into a prime (221120219) 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 15 ways as a sum of consecutive naturals, for example, 19976 + ... + 29004.

It is an arithmetic number, because the mean of its divisors is an integer number (13003200).

Almost surely, 2^221120210 is an apocalyptic number.

221120210 is a deficient number, since it is larger than the sum of its proper divisors (194982190).

221120210 is a wasteful number, since it uses less digits than its factorization.

221120210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9146.

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

The square root of 221120210 is about 14870.1112974988. Note that the first 3 decimals coincide. The cubic root of 221120210 is about 604.7039600756.

Adding to 221120210 its reverse (12021122), we get a palindrome (233141332).

The spelling of 221120210 in words is "two hundred twenty-one million, one hundred twenty thousand, two hundred ten".