221222111010222 has 128 divisors (see below), whose sum is σ = 558745959628800. Its totient is φ = 56965895913600.

The previous prime is 221222111010181. The next prime is 221222111010409. The reversal of 221222111010222 is 222010111222122.

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, 74325229 + ... + 77244312.

It is an arithmetic number, because the mean of its divisors is an integer number (4365202809600).

Almost surely, 2^{221222111010222} is an apocalyptic number.

221222111010222 is an abundant number, since it is smaller than the sum of its proper divisors (337523848618578).

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

221222111010222 is a wasteful number, since it uses less digits than its factorization.

221222111010222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151569662.

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

Adding to 221222111010222 its reverse (222010111222122), we get a palindrome (443232222232344).

The spelling of 221222111010222 in words is "two hundred twenty-one trillion, two hundred twenty-two billion, one hundred eleven million, ten thousand, two hundred twenty-two".