21223221112222 has 8 divisors (see below), whose sum is σ = 31966926406272. Its totient is φ = 10567578976800.

The previous prime is 21223221112217. The next prime is 21223221112273. The reversal of 21223221112222 is 22221112232212.

It is a happy number.

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

It is a super-2 number, since 2×21223221112222² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22015789054 + ... + 22015790017.

It is an arithmetic number, because the mean of its divisors is an integer number (3995865800784).

Almost surely, 2^{21223221112222} is an apocalyptic number.

21223221112222 is a deficient number, since it is larger than the sum of its proper divisors (10743705294050).

21223221112222 is a wasteful number, since it uses less digits than its factorization.

21223221112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44031579314.

The product of its digits is 1536, while the sum is 25.

Adding to 21223221112222 its reverse (22221112232212), we get a palindrome (43444333344434).

The spelling of 21223221112222 in words is "twenty-one trillion, two hundred twenty-three billion, two hundred twenty-one million, one hundred twelve thousand, two hundred twenty-two".