12067477021 has 4 divisors (see below), whose sum is σ = 12074339200. Its totient is φ = 12060614844.

The previous prime is 12067477007. The next prime is 12067477063. The reversal of 12067477021 is 12077476021.

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 12067477021 - 2²¹ = 12065379869 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 (12067477001) 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, 3428451 + ... + 3431968.

It is an arithmetic number, because the mean of its divisors is an integer number (3018584800).

Almost surely, 2^12067477021 is an apocalyptic number.

It is an amenable number.

12067477021 is a deficient number, since it is larger than the sum of its proper divisors (6862179).

12067477021 is an equidigital number, since it uses as much as digits as its factorization.

12067477021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862178.

The product of its (nonzero) digits is 32928, while the sum is 37.

The spelling of 12067477021 in words is "twelve billion, sixty-seven million, four hundred seventy-seven thousand, twenty-one".