11133125621 has 4 divisors (see below), whose sum is σ = 11237173632. Its totient is φ = 11029077612.

The previous prime is 11133125593. The next prime is 11133125651. The reversal of 11133125621 is 12652133111.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11133125621 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 (11133125651) 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, 52023845 + ... + 52024058.

It is an arithmetic number, because the mean of its divisors is an integer number (2809293408).

Almost surely, 2^11133125621 is an apocalyptic number.

It is an amenable number.

11133125621 is a deficient number, since it is larger than the sum of its proper divisors (104048011).

11133125621 is a wasteful number, since it uses less digits than its factorization.

11133125621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104048010.

The product of its digits is 1080, while the sum is 26.

Adding to 11133125621 its reverse (12652133111), we get a palindrome (23785258732).

The spelling of 11133125621 in words is "eleven billion, one hundred thirty-three million, one hundred twenty-five thousand, six hundred twenty-one".