221021222220222 has 8 divisors (see below), whose sum is σ = 442042444440456. Its totient is φ = 73673740740072.

The previous prime is 221021222220221. The next prime is 221021222220307. The reversal of 221021222220222 is 222022222120122.

It is a sphenic number, since it is the product of 3 distinct primes.

221021222220222 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 221021222220192 and 221021222220201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221021222220221) 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, 18418435185013 + ... + 18418435185024.

It is an arithmetic number, because the mean of its divisors is an integer number (55255305555057).

Almost surely, 2^{221021222220222} is an apocalyptic number.

221021222220222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221021222220222 is a wasteful number, since it uses less digits than its factorization.

221021222220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36836870370042.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 221021222220222 its reverse (222022222120122), we get a palindrome (443043444340344).

The spelling of 221021222220222 in words is "two hundred twenty-one trillion, twenty-one billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-two".