221110211211222 has 8 divisors (see below), whose sum is σ = 442220422422456. Its totient is φ = 73703403737072.

The previous prime is 221110211211139. The next prime is 221110211211229. The reversal of 221110211211222 is 222112112011122.

It is a sphenic number, since it is the product of 3 distinct primes.

221110211211222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221110211211229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18425850934263 + ... + 18425850934274.

It is an arithmetic number, because the mean of its divisors is an integer number (55277552802807).

Almost surely, 2^{221110211211222} is an apocalyptic number.

221110211211222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221110211211222 is a wasteful number, since it uses less digits than its factorization.

221110211211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36851701868542.

The product of its (nonzero) digits is 128, while the sum is 21.

Adding to 221110211211222 its reverse (222112112011122), we get a palindrome (443222323222344).

The spelling of 221110211211222 in words is "two hundred twenty-one trillion, one hundred ten billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-two".