221001220210 has 8 divisors (see below), whose sum is σ = 397802196396. Its totient is φ = 88400488080.

The previous prime is 221001220201. The next prime is 221001220213. The reversal of 221001220210 is 12022100122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 217298619409 + 3702600801 = 466153^2 + 60849^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221001220213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11050061001 + ... + 11050061020.

Almost surely, 2^221001220210 is an apocalyptic number.

221001220210 is a deficient number, since it is larger than the sum of its proper divisors (176800976186).

221001220210 is a wasteful number, since it uses less digits than its factorization.

221001220210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22100122028.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 221001220210 its reverse (12022100122), we get a palindrome (233023320332).

The spelling of 221001220210 in words is "two hundred twenty-one billion, one million, two hundred twenty thousand, two hundred ten".