221122121022222 has 16 divisors (see below), whose sum is σ = 505421990908032. Its totient is φ = 63177748863480.

The previous prime is 221122121022221. The next prime is 221122121022227. The reversal of 221122121022222 is 222220121221122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221122121022192 and 221122121022201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122121022221) 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, 2632406202604 + ... + 2632406202687.

It is an arithmetic number, because the mean of its divisors is an integer number (31588874431752).

Almost surely, 2^{221122121022222} is an apocalyptic number.

221122121022222 is an abundant number, since it is smaller than the sum of its proper divisors (284299869885810).

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

221122121022222 is a wasteful number, since it uses less digits than its factorization.

221122121022222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5264812405303.

The product of its (nonzero) digits is 1024, while the sum is 24.

Adding to 221122121022222 its reverse (222220121221122), we get a palindrome (443342242243344).

The spelling of 221122121022222 in words is "two hundred twenty-one trillion, one hundred twenty-two billion, one hundred twenty-one million, twenty-two thousand, two hundred twenty-two".