21210212211202 has 24 divisors (see below), whose sum is σ = 37010032523856. Its totient is φ = 9089998468488.

The previous prime is 21210212211163. The next prime is 21210212211203. The reversal of 21210212211202 is 20211221201212.

It is a self number, because there is not a number n which added to its sum of digits gives 21210212211202.

It is not an unprimeable number, because it can be changed into a prime (21210212211203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9056673 + ... + 11155435.

It is an arithmetic number, because the mean of its divisors is an integer number (1542084688494).

Almost surely, 2^{21210212211202} is an apocalyptic number.

21210212211202 is a deficient number, since it is larger than the sum of its proper divisors (15799820312654).

21210212211202 is a wasteful number, since it uses less digits than its factorization.

21210212211202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2201902 (or 2201895 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21210212211202 its reverse (20211221201212), we get a palindrome (41421433412414).

The spelling of 21210212211202 in words is "twenty-one trillion, two hundred ten billion, two hundred twelve million, two hundred eleven thousand, two hundred two".