221211200210 has 384 divisors, whose sum is σ = 570932457984. Its totient is φ = 60545802240.

The previous prime is 221211200179. The next prime is 221211200213. The reversal of 221211200210 is 12002112122.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (221211200213) 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 191 ways as a sum of consecutive naturals, for example, 510880154 + ... + 510880586.

It is an arithmetic number, because the mean of its divisors is an integer number (1486803276).

Almost surely, 2^221211200210 is an apocalyptic number.

221211200210 is an abundant number, since it is smaller than the sum of its proper divisors (349721257774).

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

221211200210 is a wasteful number, since it uses less digits than its factorization.

221211200210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 221211200210 its reverse (12002112122), we get a palindrome (233213312332).

The spelling of 221211200210 in words is "two hundred twenty-one billion, two hundred eleven million, two hundred thousand, two hundred ten".