221001221210210 has 384 divisors, whose sum is σ = 510966536947200. Its totient is φ = 68301285212160.

The previous prime is 221001221210129. The next prime is 221001221210219. The reversal of 221001221210210 is 12012122100122.

It is not an unprimeable number, because it can be changed into a prime (221001221210219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 34918818326 + ... + 34918824654.

It is an arithmetic number, because the mean of its divisors is an integer number (1330642023300).

Almost surely, 2^{221001221210210} is an apocalyptic number.

221001221210210 is an abundant number, since it is smaller than the sum of its proper divisors (289965315736990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221001221210210 is a wasteful number, since it uses less digits than its factorization.

221001221210210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7226 (or 7219 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 221001221210210 its reverse (12012122100122), we get a palindrome (233013343310332).

The spelling of 221001221210210 in words is "two hundred twenty-one trillion, one billion, two hundred twenty-one million, two hundred ten thousand, two hundred ten".