13021125563 has 4 divisors (see below), whose sum is σ = 13023270120. Its totient is φ = 13018981008.

The previous prime is 13021125553. The next prime is 13021125577. The reversal of 13021125563 is 36552112031.

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

It is a cyclic number.

It is not a de Polignac number, because 13021125563 - 2²⁴ = 13004348347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13021125553) 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, 1063145 + ... + 1075322.

It is an arithmetic number, because the mean of its divisors is an integer number (3255817530).

Almost surely, 2^13021125563 is an apocalyptic number.

13021125563 is a deficient number, since it is larger than the sum of its proper divisors (2144557).

13021125563 is an equidigital number, since it uses as much as digits as its factorization.

13021125563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144556.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 13021125563 its reverse (36552112031), we get a palindrome (49573237594).

The spelling of 13021125563 in words is "thirteen billion, twenty-one million, one hundred twenty-five thousand, five hundred sixty-three".