12940881281 has 4 divisors (see below), whose sum is σ = 13042778112. Its totient is φ = 12838984452.

The previous prime is 12940881271. The next prime is 12940881293. The reversal of 12940881281 is 18218804921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12940881281 is a prime.

It is a super-3 number, since 3×12940881281³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12940881221) 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, 50948225 + ... + 50948478.

It is an arithmetic number, because the mean of its divisors is an integer number (3260694528).

Almost surely, 2^12940881281 is an apocalyptic number.

It is an amenable number.

12940881281 is a deficient number, since it is larger than the sum of its proper divisors (101896831).

12940881281 is a wasteful number, since it uses less digits than its factorization.

12940881281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101896830.

The product of its (nonzero) digits is 73728, while the sum is 44.

The spelling of 12940881281 in words is "twelve billion, nine hundred forty million, eight hundred eighty-one thousand, two hundred eighty-one".