21202111102102 has 64 divisors (see below), whose sum is σ = 38863952824320. Its totient is φ = 8468154432000.

The previous prime is 21202111102097. The next prime is 21202111102177. The reversal of 21202111102102 is 20120111120212.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 10228224 + ... + 12125212.

It is an arithmetic number, because the mean of its divisors is an integer number (607249262880).

Almost surely, 2^{21202111102102} is an apocalyptic number.

21202111102102 is a deficient number, since it is larger than the sum of its proper divisors (17661841722218).

21202111102102 is a wasteful number, since it uses less digits than its factorization.

21202111102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897477.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21202111102102 its reverse (20120111120212), we get a palindrome (41322222222314).

The spelling of 21202111102102 in words is "twenty-one trillion, two hundred two billion, one hundred eleven million, one hundred two thousand, one hundred two".