12012420125511 has 56 divisors (see below), whose sum is σ = 19446988009680. Its totient is φ = 7372751694336.

The previous prime is 12012420125507. The next prime is 12012420125513. The reversal of 12012420125511 is 11552102421021.

12012420125511 is a `hidden beast` number, since 1 + 2 + 0 + 1 + 2 + 4 + 20 + 125 + 511 = 666.

12012420125511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12012420125511 - 2² = 12012420125507 is a prime.

It is a super-2 number, since 2×12012420125511² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12012420125513) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1919575 + ... + 5263991.

It is an arithmetic number, because the mean of its divisors is an integer number (347267643030).

Almost surely, 2^{12012420125511} is an apocalyptic number.

12012420125511 is a deficient number, since it is larger than the sum of its proper divisors (7434567884169).

12012420125511 is an equidigital number, since it uses as much as digits as its factorization.

12012420125511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3344827 (or 3344812 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 12012420125511 its reverse (11552102421021), we get a palindrome (23564522546532).

The spelling of 12012420125511 in words is "twelve trillion, twelve billion, four hundred twenty million, one hundred twenty-five thousand, five hundred eleven".