21202111102 has 16 divisors (see below), whose sum is σ = 33821001360. Its totient is φ = 9933890688.

The previous prime is 21202111081. The next prime is 21202111111. The reversal of 21202111102 is 20111120212.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1353768 + ... + 1369339.

It is an arithmetic number, because the mean of its divisors is an integer number (2113812585).

Almost surely, 2^21202111102 is an apocalyptic number.

21202111102 is a deficient number, since it is larger than the sum of its proper divisors (12618890258).

21202111102 is a wasteful number, since it uses less digits than its factorization.

21202111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723355.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21202111102 its reverse (20111120212), we get a palindrome (41313231314).

The spelling of 21202111102 in words is "twenty-one billion, two hundred two million, one hundred eleven thousand, one hundred two".