221022221222 has 16 divisors (see below), whose sum is σ = 367601788944. Its totient is φ = 98817684000.

The previous prime is 221022221221. The next prime is 221022221249. The reversal of 221022221222 is 222122220122.

It is a junction number, because it is equal to n+sod(n) for n = 221022221194 and 221022221203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221022221221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82346729 + ... + 82349412.

It is an arithmetic number, because the mean of its divisors is an integer number (22975111809).

Almost surely, 2^221022221222 is an apocalyptic number.

221022221222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

221022221222 is a deficient number, since it is larger than the sum of its proper divisors (146579567722).

221022221222 is a wasteful number, since it uses less digits than its factorization.

221022221222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164696215.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 221022221222 its reverse (222122220122), we get a palindrome (443144441344).

It can be divided in two parts, 221022 and 221222, that added together give a palindrome (442244).

The spelling of 221022221222 in words is "two hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, two hundred twenty-two".