12020306511 has 16 divisors (see below), whose sum is σ = 16102044000. Its totient is φ = 7976137728.

The previous prime is 12020306503. The next prime is 12020306527. The reversal of 12020306511 is 11560302021.

It is not a de Polignac number, because 12020306511 - 2³ = 12020306503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12020306581) 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 15 ways as a sum of consecutive naturals, for example, 585655 + ... + 605831.

It is an arithmetic number, because the mean of its divisors is an integer number (1006377750).

Almost surely, 2^12020306511 is an apocalyptic number.

12020306511 is a deficient number, since it is larger than the sum of its proper divisors (4081737489).

12020306511 is a wasteful number, since it uses less digits than its factorization.

12020306511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21098.

The product of its (nonzero) digits is 360, while the sum is 21.

Adding to 12020306511 its reverse (11560302021), we get a palindrome (23580608532).

The spelling of 12020306511 in words is "twelve billion, twenty million, three hundred six thousand, five hundred eleven".