221301222210 has 96 divisors (see below), whose sum is σ = 606344963328. Its totient is φ = 55888905600.

The previous prime is 221301222199. The next prime is 221301222271. The reversal of 221301222210 is 12222103122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 320182 + ... + 738321.

It is an arithmetic number, because the mean of its divisors is an integer number (6316093368).

Almost surely, 2^221301222210 is an apocalyptic number.

221301222210 is an abundant number, since it is smaller than the sum of its proper divisors (385043741118).

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

221301222210 is a wasteful number, since it uses less digits than its factorization.

221301222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058640 (or 1058637 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 221301222210 its reverse (12222103122), we get a palindrome (233523325332).

The spelling of 221301222210 in words is "two hundred twenty-one billion, three hundred one million, two hundred twenty-two thousand, two hundred ten".