21321102000121 has 32 divisors (see below), whose sum is σ = 26866282929408. Its totient is φ = 16437172976640.

The previous prime is 21321102000109. The next prime is 21321102000281. The reversal of 21321102000121 is 12100020112312.

It is a cyclic number.

It is not a de Polignac number, because 21321102000121 - 2⁹ = 21321101999609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321102000095 and 21321102000104.

It is not an unprimeable number, because it can be changed into a prime (21321102009121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 967980 + ... + 6601453.

It is an arithmetic number, because the mean of its divisors is an integer number (839571341544).

Almost surely, 2^{21321102000121} is an apocalyptic number.

It is an amenable number.

21321102000121 is a deficient number, since it is larger than the sum of its proper divisors (5545180929287).

21321102000121 is a wasteful number, since it uses less digits than its factorization.

21321102000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7569841.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21321102000121 its reverse (12100020112312), we get a palindrome (33421122112433).

The spelling of 21321102000121 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred two million, one hundred twenty-one", and thus it is an aban number.