12001520511 has 6 divisors (see below), whose sum is σ = 17335529640. Its totient is φ = 8001013668.

The previous prime is 12001520473. The next prime is 12001520519. The reversal of 12001520511 is 11502510021.

12001520511 is a `hidden beast` number, since 1 + 2 + 0 + 0 + 152 + 0 + 511 = 666.

It is not a de Polignac number, because 12001520511 - 2¹⁰ = 12001519487 is a prime.

It is a super-2 number, since 2×12001520511² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001520519) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666751131 + ... + 666751148.

It is an arithmetic number, because the mean of its divisors is an integer number (2889254940).

Almost surely, 2^12001520511 is an apocalyptic number.

12001520511 is a deficient number, since it is larger than the sum of its proper divisors (5334009129).

12001520511 is a wasteful number, since it uses less digits than its factorization.

12001520511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333502285 (or 1333502282 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The spelling of 12001520511 in words is "twelve billion, one million, five hundred twenty thousand, five hundred eleven".