21002132200013 has 4 divisors (see below), whose sum is σ = 21009630286428. Its totient is φ = 20994634113600.

The previous prime is 21002132199977. The next prime is 21002132200079. The reversal of 21002132200013 is 31000223120012.

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 11167874534569 + 9834257665444 = 3341837^2 + 3135962^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002132200013 - 2²² = 21002128005709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21002132199964 and 21002132200000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002132100013) 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, 3749039006 + ... + 3749044607.

It is an arithmetic number, because the mean of its divisors is an integer number (5252407571607).

Almost surely, 2^{21002132200013} is an apocalyptic number.

It is an amenable number.

21002132200013 is a deficient number, since it is larger than the sum of its proper divisors (7498086415).

21002132200013 is an equidigital number, since it uses as much as digits as its factorization.

21002132200013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7498086414.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21002132200013 its reverse (31000223120012), we get a palindrome (52002355320025).

The spelling of 21002132200013 in words is "twenty-one trillion, two billion, one hundred thirty-two million, two hundred thousand, thirteen".