12874279221 has 6 divisors (see below), whose sum is σ = 18596181110. Its totient is φ = 8582852808.

The previous prime is 12874279213. The next prime is 12874279273. The reversal of 12874279221 is 12297247821.

It can be written as a sum of positive squares in only one way, i.e., 12801791025 + 72488196 = 113145^2 + 8514^2 .

It is not a de Polignac number, because 12874279221 - 2³ = 12874279213 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 (12874274221) 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 5 ways as a sum of consecutive naturals, for example, 715237726 + ... + 715237743.

Almost surely, 2^12874279221 is an apocalyptic number.

It is an amenable number.

12874279221 is a deficient number, since it is larger than the sum of its proper divisors (5721901889).

12874279221 is a wasteful number, since it uses less digits than its factorization.

12874279221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430475475 (or 1430475472 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The spelling of 12874279221 in words is "twelve billion, eight hundred seventy-four million, two hundred seventy-nine thousand, two hundred twenty-one".