21221222000222 has 8 divisors (see below), whose sum is σ = 31832063114472. Its totient is φ = 10610534295400.

The previous prime is 21221222000221. The next prime is 21221222000249. The reversal of 21221222000222 is 22200022212212.

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

It is a junction number, because it is equal to n+sod(n) for n = 21221222000194 and 21221222000203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21221222000221) 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, 38005904 + ... + 38560227.

It is an arithmetic number, because the mean of its divisors is an integer number (3979007889309).

Almost surely, 2^{21221222000222} is an apocalyptic number.

21221222000222 is a deficient number, since it is larger than the sum of its proper divisors (10610841114250).

21221222000222 is a wasteful number, since it uses less digits than its factorization.

21221222000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76704714.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21221222000222 its reverse (22200022212212), we get a palindrome (43421244212434).

The spelling of 21221222000222 in words is "twenty-one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-two", and thus it is an aban number.