221220100221222 has 16 divisors (see below), whose sum is σ = 465726526781760. Its totient is φ = 69858979017192.

The previous prime is 221220100221191. The next prime is 221220100221277. The reversal of 221220100221222 is 222122001022122.

221220100221222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 970263597348 + ... + 970263597575.

It is an arithmetic number, because the mean of its divisors is an integer number (29107907923860).

Almost surely, 2^{221220100221222} is an apocalyptic number.

221220100221222 is an abundant number, since it is smaller than the sum of its proper divisors (244506426560538).

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

221220100221222 is a wasteful number, since it uses less digits than its factorization.

221220100221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1940527194947.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 221220100221222 its reverse (222122001022122), we get a palindrome (443342101243344).

The spelling of 221220100221222 in words is "two hundred twenty-one trillion, two hundred twenty billion, one hundred million, two hundred twenty-one thousand, two hundred twenty-two".