21210120222 has 8 divisors (see below), whose sum is σ = 42420240456. Its totient is φ = 7070040072.

The previous prime is 21210120209. The next prime is 21210120257. The reversal of 21210120222 is 22202101212.

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

21210120222 is an admirable number.

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, 1767510013 + ... + 1767510024.

It is an arithmetic number, because the mean of its divisors is an integer number (5302530057).

Almost surely, 2^21210120222 is an apocalyptic number.

21210120222 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.

21210120222 is a wasteful number, since it uses less digits than its factorization.

21210120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3535020042.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21210120222 its reverse (22202101212), we get a palindrome (43412221434).

The spelling of 21210120222 in words is "twenty-one billion, two hundred ten million, one hundred twenty thousand, two hundred twenty-two".