12427013021 has 8 divisors (see below), whose sum is σ = 12471722040. Its totient is φ = 12382336512.

The previous prime is 12427013017. The next prime is 12427013047. The reversal of 12427013021 is 12031072421.

It can be written as a sum of positive squares in 4 ways, for example, as 292888996 + 12134124025 = 17114^2 + 110155^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12427013021 - 2² = 12427013017 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 (12427012021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 960431 + ... + 973283.

It is an arithmetic number, because the mean of its divisors is an integer number (1558965255).

Almost surely, 2^12427013021 is an apocalyptic number.

It is an amenable number.

12427013021 is a deficient number, since it is larger than the sum of its proper divisors (44709019).

12427013021 is a wasteful number, since it uses less digits than its factorization.

12427013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16255.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 12427013021 its reverse (12031072421), we get a palindrome (24458085442).

The spelling of 12427013021 in words is "twelve billion, four hundred twenty-seven million, thirteen thousand, twenty-one".