21321102000113 has 4 divisors (see below), whose sum is σ = 22056312413940. Its totient is φ = 20585891586288.

The previous prime is 21321102000109. The next prime is 21321102000281. The reversal of 21321102000113 is 31100020112312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5592009456049 + 15729092544064 = 2364743^2 + 3965992^2 .

It is a cyclic number.

It is not a de Polignac number, because 21321102000113 - 2² = 21321102000109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321102000091 and 21321102000100.

It is not an unprimeable number, because it can be changed into a prime (21321102000313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 367605206870 + ... + 367605206927.

It is an arithmetic number, because the mean of its divisors is an integer number (5514078103485).

Almost surely, 2^{21321102000113} is an apocalyptic number.

It is an amenable number.

21321102000113 is a deficient number, since it is larger than the sum of its proper divisors (735210413827).

21321102000113 is an equidigital number, since it uses as much as digits as its factorization.

21321102000113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735210413826.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21321102000113 its reverse (31100020112312), we get a palindrome (52421122112425).

The spelling of 21321102000113 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred two million, one hundred thirteen", and thus it is an aban number.