12511322611 has 4 divisors (see below), whose sum is σ = 12513036112. Its totient is φ = 12509609112.

The previous prime is 12511322609. The next prime is 12511322633. The reversal of 12511322611 is 11622311521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11622311521 = 677 ⋅17167373.

It is a cyclic number.

It is not a de Polignac number, because 12511322611 - 2¹ = 12511322609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12511322671) 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, 845751 + ... + 860416.

It is an arithmetic number, because the mean of its divisors is an integer number (3128259028).

Almost surely, 2^12511322611 is an apocalyptic number.

12511322611 is a deficient number, since it is larger than the sum of its proper divisors (1713501).

12511322611 is an equidigital number, since it uses as much as digits as its factorization.

12511322611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713500.

The product of its digits is 720, while the sum is 25.

The spelling of 12511322611 in words is "twelve billion, five hundred eleven million, three hundred twenty-two thousand, six hundred eleven".