21153002200613 has 4 divisors (see below), whose sum is σ = 21269869616268. Its totient is φ = 21036134784960.

The previous prime is 21153002200559. The next prime is 21153002200651. The reversal of 21153002200613 is 31600220035112.

It is a happy number.

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 11519663647969 + 9633338552644 = 3394063^2 + 3103762^2 .

It is a cyclic number.

It is not a de Polignac number, because 21153002200613 - 2⁴⁰ = 20053490572837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21153002200313) 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, 58433707556 + ... + 58433707917.

It is an arithmetic number, because the mean of its divisors is an integer number (5317467404067).

Almost surely, 2^{21153002200613} is an apocalyptic number.

It is an amenable number.

21153002200613 is a deficient number, since it is larger than the sum of its proper divisors (116867415655).

21153002200613 is a wasteful number, since it uses less digits than its factorization.

21153002200613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116867415654.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 21153002200613 its reverse (31600220035112), we get a palindrome (52753222235725).

The spelling of 21153002200613 in words is "twenty-one trillion, one hundred fifty-three billion, two million, two hundred thousand, six hundred thirteen".