21210002012222 has 16 divisors (see below), whose sum is σ = 31932861541632. Its totient is φ = 10565715959640.

The previous prime is 21210002012149. The next prime is 21210002012233. The reversal of 21210002012222 is 22221020001212.

It is a happy number.

It is a super-2 number, since 2×21210002012222² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21210002012222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43705673 + ... + 44188299.

It is an arithmetic number, because the mean of its divisors is an integer number (1995803846352).

Almost surely, 2^{21210002012222} is an apocalyptic number.

21210002012222 is a deficient number, since it is larger than the sum of its proper divisors (10722859529410).

21210002012222 is a wasteful number, since it uses less digits than its factorization.

21210002012222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563983.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21210002012222 its reverse (22221020001212), we get a palindrome (43431022013434).

The spelling of 21210002012222 in words is "twenty-one trillion, two hundred ten billion, two million, twelve thousand, two hundred twenty-two".