12087517311 has 12 divisors (see below), whose sum is σ = 17629260688. Its totient is φ = 7980107904.

The previous prime is 12087517301. The next prime is 12087517339. The reversal of 12087517311 is 11371578021.

12087517311 is a `hidden beast` number, since 120 + 8 + 7 + 517 + 3 + 11 = 666.

It is not a de Polignac number, because 12087517311 - 2¹⁷ = 12087386239 is a prime.

It is a super-2 number, since 2×12087517311² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12087517301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6518770 + ... + 6520623.

Almost surely, 2^12087517311 is an apocalyptic number.

12087517311 is a deficient number, since it is larger than the sum of its proper divisors (5541743377).

12087517311 is a wasteful number, since it uses less digits than its factorization.

12087517311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13039502 (or 13039499 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 36.

The spelling of 12087517311 in words is "twelve billion, eighty-seven million, five hundred seventeen thousand, three hundred eleven".