12123641511 has 24 divisors (see below), whose sum is σ = 18549797760. Its totient is φ = 7603808256.

The previous prime is 12123641507. The next prime is 12123641531. The reversal of 12123641511 is 11514632121.

12123641511 is a `hidden beast` number, since 1 + 2 + 1 + 2 + 3 + 641 + 5 + 11 = 666.

It is not a de Polignac number, because 12123641511 - 2² = 12123641507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123641531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 381450 + ... + 412008.

It is an arithmetic number, because the mean of its divisors is an integer number (772908240).

Almost surely, 2^12123641511 is an apocalyptic number.

12123641511 is a deficient number, since it is larger than the sum of its proper divisors (6426156249).

12123641511 is a wasteful number, since it uses less digits than its factorization.

12123641511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33175 (or 33172 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The spelling of 12123641511 in words is "twelve billion, one hundred twenty-three million, six hundred forty-one thousand, five hundred eleven".