11712895921 has 4 divisors (see below), whose sum is σ = 11714754672. Its totient is φ = 11711037172.

The previous prime is 11712895903. The next prime is 11712895937. The reversal of 11712895921 is 12959821711.

11712895921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12959821711 = 59467 ⋅217933.

It is a cyclic number.

It is not a de Polignac number, because 11712895921 - 2⁷ = 11712895793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11712895951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 919891 + ... + 932536.

It is an arithmetic number, because the mean of its divisors is an integer number (2928688668).

Almost surely, 2^11712895921 is an apocalyptic number.

It is an amenable number.

11712895921 is a deficient number, since it is larger than the sum of its proper divisors (1858751).

11712895921 is an equidigital number, since it uses as much as digits as its factorization.

11712895921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1858750.

The product of its digits is 90720, while the sum is 46.

The spelling of 11712895921 in words is "eleven billion, seven hundred twelve million, eight hundred ninety-five thousand, nine hundred twenty-one".