21222000210 has 32 divisors (see below), whose sum is σ = 51155231040. Its totient is φ = 5634485568.

The previous prime is 21222000209. The next prime is 21222000251. The reversal of 21222000210 is 1200022212.

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, 1537672 + ... + 1551411.

It is an arithmetic number, because the mean of its divisors is an integer number (1598600970).

Almost surely, 2^21222000210 is an apocalyptic number.

21222000210 is an abundant number, since it is smaller than the sum of its proper divisors (29933230830).

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

21222000210 is a wasteful number, since it uses less digits than its factorization.

21222000210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089322.

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

Adding to 21222000210 its reverse (1200022212), we get a palindrome (22422022422).

The spelling of 21222000210 in words is "twenty-one billion, two hundred twenty-two million, two hundred ten", and thus it is an aban number.