12420011511 has 48 divisors (see below), whose sum is σ = 19180006560. Its totient is φ = 7730553600.

The previous prime is 12420011507. The next prime is 12420011531. The reversal of 12420011511 is 11511002421.

12420011511 is a `hidden beast` number, since 124 + 20 + 0 + 11 + 511 = 666.

It is not a de Polignac number, because 12420011511 - 2² = 12420011507 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12420011531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1128045 + ... + 1139001.

It is an arithmetic number, because the mean of its divisors is an integer number (399583470).

Almost surely, 2^12420011511 is an apocalyptic number.

12420011511 is a deficient number, since it is larger than the sum of its proper divisors (6759995049).

12420011511 is a wasteful number, since it uses less digits than its factorization.

12420011511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11136 (or 11133 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

Adding to 12420011511 its reverse (11511002421), we get a palindrome (23931013932).

The spelling of 12420011511 in words is "twelve billion, four hundred twenty million, eleven thousand, five hundred eleven".