12021458765 has 4 divisors (see below), whose sum is σ = 14425750524. Its totient is φ = 9617167008.

The previous prime is 12021458671. The next prime is 12021458797. The reversal of 12021458765 is 56785412021.

12021458765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4359432676 + 7662026089 = 66026^2 + 87533^2 .

It is a cyclic number.

It is not a de Polignac number, because 12021458765 - 2²⁸ = 11753023309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1202145872 + ... + 1202145881.

It is an arithmetic number, because the mean of its divisors is an integer number (3606437631).

Almost surely, 2^12021458765 is an apocalyptic number.

It is an amenable number.

12021458765 is a deficient number, since it is larger than the sum of its proper divisors (2404291759).

12021458765 is an equidigital number, since it uses as much as digits as its factorization.

12021458765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404291758.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 12021458765 in words is "twelve billion, twenty-one million, four hundred fifty-eight thousand, seven hundred sixty-five".