21102100000012 has 24 divisors (see below), whose sum is σ = 37023983221680. Its totient is φ = 10523838900480.

The previous prime is 21102100000001. The next prime is 21102100000027. The reversal of 21102100000012 is 21000000120112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1784664 + ... + 6737152.

It is an arithmetic number, because the mean of its divisors is an integer number (1542665967570).

Almost surely, 2^{21102100000012} is an apocalyptic number.

It is an amenable number.

21102100000012 is a deficient number, since it is larger than the sum of its proper divisors (15921883221668).

21102100000012 is a wasteful number, since it uses less digits than its factorization.

21102100000012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4955241 (or 4955239 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21102100000012 its reverse (21000000120112), we get a palindrome (42102100120124).

The spelling of 21102100000012 in words is "twenty-one trillion, one hundred two billion, one hundred million, twelve", and thus it is an aban number.