12711021 has 8 divisors (see below), whose sum is σ = 17162880. Its totient is φ = 8366592.

The previous prime is 12711011. The next prime is 12711037. The reversal of 12711021 is 12011721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12711021 - 2⁵ = 12710989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12711001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26580 + ... + 27053.

It is an arithmetic number, because the mean of its divisors is an integer number (2145360).

Almost surely, 2^12711021 is an apocalyptic number.

It is an amenable number.

12711021 is a deficient number, since it is larger than the sum of its proper divisors (4451859).

12711021 is an equidigital number, since it uses as much as digits as its factorization.

12711021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53715.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 12711021 is about 3565.2518845097. The cubic root of 12711021 is about 233.3781245078.

Adding to 12711021 its reverse (12011721), we get a palindrome (24722742).

The spelling of 12711021 in words is "twelve million, seven hundred eleven thousand, twenty-one".