221122002228 has 12 divisors (see below), whose sum is σ = 515951338560. Its totient is φ = 73707334072.

The previous prime is 221122002221. The next prime is 221122002229. The reversal of 221122002228 is 822200221122.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 221122002198 and 221122002207.

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 3 ways as a sum of consecutive naturals, for example, 9213416748 + ... + 9213416771.

It is an arithmetic number, because the mean of its divisors is an integer number (42995944880).

Almost surely, 2^221122002228 is an apocalyptic number.

It is an amenable number.

221122002228 is an abundant number, since it is smaller than the sum of its proper divisors (294829336332).

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

221122002228 is a wasteful number, since it uses less digits than its factorization.

221122002228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18426833526 (or 18426833524 counting only the distinct ones).

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

The spelling of 221122002228 in words is "two hundred twenty-one billion, one hundred twenty-two million, two thousand, two hundred twenty-eight".