21112021111102 has 4 divisors (see below), whose sum is σ = 31668031666656. Its totient is φ = 10556010555550.

The previous prime is 21112021111087. The next prime is 21112021111121. The reversal of 21112021111102 is 20111112021112.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5278005277774 + ... + 5278005277777.

It is an arithmetic number, because the mean of its divisors is an integer number (7917007916664).

Almost surely, 2^{21112021111102} is an apocalyptic number.

21112021111102 is a deficient number, since it is larger than the sum of its proper divisors (10556010555554).

21112021111102 is a wasteful number, since it uses less digits than its factorization.

21112021111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10556010555553.

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

Adding to 21112021111102 its reverse (20111112021112), we get a palindrome (41223133132214).

The spelling of 21112021111102 in words is "twenty-one trillion, one hundred twelve billion, twenty-one million, one hundred eleven thousand, one hundred two".