21210000222 has 32 divisors (see below), whose sum is σ = 44285392800. Its totient is φ = 6763575168.

The previous prime is 21210000209. The next prime is 21210000271. The reversal of 21210000222 is 22200001212.

21210000222 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 21210000198 and 21210000207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 540193 + ... + 578124.

It is an arithmetic number, because the mean of its divisors is an integer number (1383918525).

Almost surely, 2^21210000222 is an apocalyptic number.

21210000222 is an abundant number, since it is smaller than the sum of its proper divisors (23075392578).

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

21210000222 is a wasteful number, since it uses less digits than its factorization.

21210000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118460.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21210000222 its reverse (22200001212), we get a palindrome (43410001434).

The spelling of 21210000222 in words is "twenty-one billion, two hundred ten million, two hundred twenty-two", and thus it is an aban number.