12874376021 has 4 divisors (see below), whose sum is σ = 13864712652. Its totient is φ = 11884039392.

The previous prime is 12874375979. The next prime is 12874376057. The reversal of 12874376021 is 12067347821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12067347821 = 59 ⋅204531319.

It can be written as a sum of positive squares in 2 ways, for example, as 4473736996 + 8400639025 = 66886^2 + 91655^2 .

It is a cyclic number.

It is not a de Polignac number, because 12874376021 - 2²² = 12870181717 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12874376021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12874376521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 495168296 + ... + 495168321.

It is an arithmetic number, because the mean of its divisors is an integer number (3466178163).

Almost surely, 2^12874376021 is an apocalyptic number.

It is an amenable number.

12874376021 is a deficient number, since it is larger than the sum of its proper divisors (990336631).

12874376021 is an equidigital number, since it uses as much as digits as its factorization.

12874376021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990336630.

The product of its (nonzero) digits is 112896, while the sum is 41.

The spelling of 12874376021 in words is "twelve billion, eight hundred seventy-four million, three hundred seventy-six thousand, twenty-one".