21210000012222 has 64 divisors (see below), whose sum is σ = 48641076480000. Its totient is φ = 6039889929216.

The previous prime is 21210000012209. The next prime is 21210000012283. The reversal of 21210000012222 is 22221000001212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20316603 + ... + 21335049.

It is an arithmetic number, because the mean of its divisors is an integer number (760016820000).

Almost surely, 2^{21210000012222} is an apocalyptic number.

21210000012222 is an abundant number, since it is smaller than the sum of its proper divisors (27431076467778).

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

21210000012222 is a wasteful number, since it uses less digits than its factorization.

21210000012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1020105.

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

Adding to 21210000012222 its reverse (22221000001212), we get a palindrome (43431000013434).

The spelling of 21210000012222 in words is "twenty-one trillion, two hundred ten billion, twelve thousand, two hundred twenty-two".