21101200011321 has 16 divisors (see below), whose sum is σ = 29080842486720. Its totient is φ = 13602329536320.

The previous prime is 21101200011299. The next prime is 21101200011349. The reversal of 21101200011321 is 12311000210112.

It is not a de Polignac number, because 21101200011321 - 2⁷ = 21101200011193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21101200011321.

It is not an unprimeable number, because it can be changed into a prime (21101200011121) 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 15 ways as a sum of consecutive naturals, for example, 977168050 + ... + 977189643.

It is an arithmetic number, because the mean of its divisors is an integer number (1817552655420).

Almost surely, 2^{21101200011321} is an apocalyptic number.

It is an amenable number.

21101200011321 is a deficient number, since it is larger than the sum of its proper divisors (7979642475399).

21101200011321 is a wasteful number, since it uses less digits than its factorization.

21101200011321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954357816.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 21101200011321 its reverse (12311000210112), we get a palindrome (33412200221433).

The spelling of 21101200011321 in words is "twenty-one trillion, one hundred one billion, two hundred million, eleven thousand, three hundred twenty-one".