21101221102102 has 8 divisors (see below), whose sum is σ = 31651915876776. Its totient is φ = 10550582476512.

The previous prime is 21101221102097. The next prime is 21101221102121. The reversal of 21101221102102 is 20120112210112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 13084828 + ... + 14608735.

It is an arithmetic number, because the mean of its divisors is an integer number (3956489484597).

Almost surely, 2^{21101221102102} is an apocalyptic number.

21101221102102 is a deficient number, since it is larger than the sum of its proper divisors (10550694774674).

21101221102102 is a wasteful number, since it uses less digits than its factorization.

21101221102102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28074542.

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

Adding to 21101221102102 its reverse (20120112210112), we get a palindrome (41221333312214).

The spelling of 21101221102102 in words is "twenty-one trillion, one hundred one billion, two hundred twenty-one million, one hundred two thousand, one hundred two".