12609261277921 has 16 divisors (see below), whose sum is σ = 15873264995328. Its totient is φ = 9730006174800.

The previous prime is 12609261277919. The next prime is 12609261277937. The reversal of 12609261277921 is 12977216290621.

12609261277921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12609261277921 - 2¹ = 12609261277919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12609361277921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 794927215 + ... + 794943076.

It is an arithmetic number, because the mean of its divisors is an integer number (992079062208).

Almost surely, 2^{12609261277921} is an apocalyptic number.

12609261277921 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12609261277921 is a deficient number, since it is larger than the sum of its proper divisors (3264003717407).

12609261277921 is a wasteful number, since it uses less digits than its factorization.

12609261277921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589870412.

The product of its (nonzero) digits is 2286144, while the sum is 55.

The spelling of 12609261277921 in words is "twelve trillion, six hundred nine billion, two hundred sixty-one million, two hundred seventy-seven thousand, nine hundred twenty-one".