21210022120222 has 16 divisors (see below), whose sum is σ = 34262572055040. Its totient is φ = 9789175655712.

The previous prime is 21210022120163. The next prime is 21210022120229. The reversal of 21210022120222 is 22202122001212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210022120222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210022120229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1365283 + ... + 6654625.

It is an arithmetic number, because the mean of its divisors is an integer number (2141410753440).

Almost surely, 2^{21210022120222} is an apocalyptic number.

21210022120222 is a deficient number, since it is larger than the sum of its proper divisors (13052549934818).

21210022120222 is a wasteful number, since it uses less digits than its factorization.

21210022120222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5443587.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21210022120222 its reverse (22202122001212), we get a palindrome (43412144121434).

The spelling of 21210022120222 in words is "twenty-one trillion, two hundred ten billion, twenty-two million, one hundred twenty thousand, two hundred twenty-two".