221122002222 has 80 divisors (see below), whose sum is σ = 540818099712. Its totient is φ = 66969769680.

The previous prime is 221122002221. The next prime is 221122002229. The reversal of 221122002222 is 222200221122.

221122002222 is a `hidden beast` number, since 221 + 1 + 220 + 0 + 2 + 222 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 221122002195 and 221122002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221122002221) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3293763 + ... + 3360225.

Almost surely, 2^221122002222 is an apocalyptic number.

221122002222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 221122002222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270409049856).

221122002222 is an abundant number, since it is smaller than the sum of its proper divisors (319696097490).

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

221122002222 is a wasteful number, since it uses less digits than its factorization.

221122002222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68355 (or 68346 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 221122002222 its reverse (222200221122), we get a palindrome (443322223344).

The spelling of 221122002222 in words is "two hundred twenty-one billion, one hundred twenty-two million, two thousand, two hundred twenty-two".