21002222202222 has 8 divisors (see below), whose sum is σ = 42004444404456. Its totient is φ = 7000740734072.

The previous prime is 21002222202193. The next prime is 21002222202257. The reversal of 21002222202222 is 22220222220012.

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

21002222202222 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1750185183513 + ... + 1750185183524.

It is an arithmetic number, because the mean of its divisors is an integer number (5250555550557).

Almost surely, 2^{21002222202222} is an apocalyptic number.

21002222202222 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.

21002222202222 is a wasteful number, since it uses less digits than its factorization.

21002222202222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500370367042.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 21002222202222 its reverse (22220222220012), we get a palindrome (43222444422234).

The spelling of 21002222202222 in words is "twenty-one trillion, two billion, two hundred twenty-two million, two hundred two thousand, two hundred twenty-two".