28272481121 has 4 divisors (see below), whose sum is σ = 28282513200. Its totient is φ = 28262449044.

The previous prime is 28272481079. The next prime is 28272481169. The reversal of 28272481121 is 12118427282.

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 not a de Polignac number, because 28272481121 - 2¹⁸ = 28272218977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28272481421) 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, 5011811 + ... + 5017448.

It is an arithmetic number, because the mean of its divisors is an integer number (7070628300).

Almost surely, 2^28272481121 is an apocalyptic number.

It is an amenable number.

28272481121 is a deficient number, since it is larger than the sum of its proper divisors (10032079).

28272481121 is a wasteful number, since it uses less digits than its factorization.

28272481121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10032078.

The product of its digits is 28672, while the sum is 38.

The spelling of 28272481121 in words is "twenty-eight billion, two hundred seventy-two million, four hundred eighty-one thousand, one hundred twenty-one".