21210210222 has 8 divisors (see below), whose sum is σ = 42420420456. Its totient is φ = 7070070072.

The previous prime is 21210210193. The next prime is 21210210223. The reversal of 21210210222 is 22201201212.

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

21210210222 is an admirable number.

It is a super-2 number, since 2×21210210222² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210210223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1767517513 + ... + 1767517524.

It is an arithmetic number, because the mean of its divisors is an integer number (5302552557).

Almost surely, 2^21210210222 is an apocalyptic number.

21210210222 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.

21210210222 is a wasteful number, since it uses less digits than its factorization.

21210210222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3535035042.

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

Adding to 21210210222 its reverse (22201201212), we get a palindrome (43411411434).

The spelling of 21210210222 in words is "twenty-one billion, two hundred ten million, two hundred ten thousand, two hundred twenty-two".