222221201221110 has 128 divisors (see below), whose sum is σ = 657113822023680. Its totient is φ = 46835761360896.

The previous prime is 222221201221091. The next prime is 222221201221141. The reversal of 222221201221110 is 11122102122222.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 41274222 + ... + 46346561.

It is an arithmetic number, because the mean of its divisors is an integer number (5133701734560).

Almost surely, 2^{222221201221110} is an apocalyptic number.

222221201221110 is an abundant number, since it is smaller than the sum of its proper divisors (434892620802570).

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

222221201221110 is a wasteful number, since it uses less digits than its factorization.

222221201221110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87621742.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222221201221110 its reverse (11122102122222), we get a palindrome (233343303343332).

The spelling of 222221201221110 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred ten".