12876970621 has 4 divisors (see below), whose sum is σ = 13224996892. Its totient is φ = 12528944352.

The previous prime is 12876970541. The next prime is 12876970627. The reversal of 12876970621 is 12607967821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12607967821 = 95633 ⋅131837.

It can be written as a sum of positive squares in 2 ways, for example, as 11388091225 + 1488879396 = 106715^2 + 38586^2 .

It is a cyclic number.

It is not a de Polignac number, because 12876970621 - 2⁹ = 12876970109 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 (12876970627) 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, 174013080 + ... + 174013153.

It is an arithmetic number, because the mean of its divisors is an integer number (3306249223).

Almost surely, 2^12876970621 is an apocalyptic number.

It is an amenable number.

12876970621 is a deficient number, since it is larger than the sum of its proper divisors (348026271).

12876970621 is an equidigital number, since it uses as much as digits as its factorization.

12876970621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348026270.

The product of its (nonzero) digits is 508032, while the sum is 49.

The spelling of 12876970621 in words is "twelve billion, eight hundred seventy-six million, nine hundred seventy thousand, six hundred twenty-one".