21321300211121 has 8 divisors (see below), whose sum is σ = 21788246712960. Its totient is φ = 20854907951728.

The previous prime is 21321300211103. The next prime is 21321300211217. The reversal of 21321300211121 is 12111200312312.

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

It is a cyclic number.

It is not a de Polignac number, because 21321300211121 - 2³⁸ = 21046422304177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321300211093 and 21321300211102.

It is not an unprimeable number, because it can be changed into a prime (21321300214121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138482831 + ... + 138636708.

It is an arithmetic number, because the mean of its divisors is an integer number (2723530839120).

Almost surely, 2^{21321300211121} is an apocalyptic number.

It is an amenable number.

21321300211121 is a deficient number, since it is larger than the sum of its proper divisors (466946501839).

21321300211121 is a wasteful number, since it uses less digits than its factorization.

21321300211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277121223.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21321300211121 its reverse (12111200312312), we get a palindrome (33432500523433).

The spelling of 21321300211121 in words is "twenty-one trillion, three hundred twenty-one billion, three hundred million, two hundred eleven thousand, one hundred twenty-one".