221201222010 has 16 divisors (see below), whose sum is σ = 530882932896. Its totient is φ = 58986992528.

The previous prime is 221201221987. The next prime is 221201222089. The reversal of 221201222010 is 10222102122.

221201222010 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3686687004 + ... + 3686687063.

It is an arithmetic number, because the mean of its divisors is an integer number (33180183306).

Almost surely, 2^221201222010 is an apocalyptic number.

221201222010 is an abundant number, since it is smaller than the sum of its proper divisors (309681710886).

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

221201222010 is a wasteful number, since it uses less digits than its factorization.

221201222010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7373374077.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221201222010 its reverse (10222102122), we get a palindrome (231423324132).

It can be divided in two parts, 221201 and 222010, that added together give a triangular number (443211 = T₉₄₁).

The spelling of 221201222010 in words is "two hundred twenty-one billion, two hundred one million, two hundred twenty-two thousand, ten".