221201221210 has 8 divisors (see below), whose sum is σ = 398162198196. Its totient is φ = 88480488480.

The previous prime is 221201221183. The next prime is 221201221243. The reversal of 221201221210 is 12122102122.

It is a happy number.

221201221210 is digitally balanced in base 3, 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 2 ways, for example, as 207517602681 + 13683618529 = 455541^2 + 116977^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11060061051 + ... + 11060061070.

Almost surely, 2^221201221210 is an apocalyptic number.

221201221210 is a deficient number, since it is larger than the sum of its proper divisors (176960976986).

221201221210 is a wasteful number, since it uses less digits than its factorization.

221201221210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22120122128.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221201221210 its reverse (12122102122), we get a palindrome (233323323332).

The spelling of 221201221210 in words is "two hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, two hundred ten".