11305125021 has 4 divisors (see below), whose sum is σ = 15073500032. Its totient is φ = 7536750012.

The previous prime is 11305125019. The next prime is 11305125047. The reversal of 11305125021 is 12052150311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 11305125021 - 2¹ = 11305125019 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 (11305125061) 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, 1884187501 + ... + 1884187506.

It is an arithmetic number, because the mean of its divisors is an integer number (3768375008).

Almost surely, 2^11305125021 is an apocalyptic number.

It is an amenable number.

11305125021 is a deficient number, since it is larger than the sum of its proper divisors (3768375011).

11305125021 is an equidigital number, since it uses as much as digits as its factorization.

11305125021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768375010.

The product of its (nonzero) digits is 300, while the sum is 21.

Adding to 11305125021 its reverse (12052150311), we get a palindrome (23357275332).

The spelling of 11305125021 in words is "eleven billion, three hundred five million, one hundred twenty-five thousand, twenty-one".