12021297511 has 8 divisors (see below), whose sum is σ = 12861441200. Its totient is φ = 11201898240.

The previous prime is 12021297487. The next prime is 12021297523. The reversal of 12021297511 is 11579212021.

12021297511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12021297511 - 2⁹ = 12021296999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021298511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5184906 + ... + 5187223.

It is an arithmetic number, because the mean of its divisors is an integer number (1607680150).

Almost surely, 2^12021297511 is an apocalyptic number.

12021297511 is a deficient number, since it is larger than the sum of its proper divisors (840143689).

12021297511 is a wasteful number, since it uses less digits than its factorization.

12021297511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10372209.

The product of its (nonzero) digits is 2520, while the sum is 31.

The spelling of 12021297511 in words is "twelve billion, twenty-one million, two hundred ninety-seven thousand, five hundred eleven".