12015356365021 has 2 divisors, whose sum is σ = 12015356365022. Its totient is φ = 12015356365020.

The previous prime is 12015356365003. The next prime is 12015356365039. The reversal of 12015356365021 is 12056365351021.

It is a happy number.

12015356365021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (12015356365003) and next prime (12015356365039).

It can be written as a sum of positive squares in only one way, i.e., 9760088284996 + 2255268080025 = 3124114^2 + 1501755^2 .

It is an emirp because it is prime and its reverse (12056365351021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12015356365021 - 2²⁹ = 12014819494109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12015356368021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6007678182510 + 6007678182511.

It is an arithmetic number, because the mean of its divisors is an integer number (6007678182511).

Almost surely, 2^{12015356365021} is an apocalyptic number.

It is an amenable number.

12015356365021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12015356365021 is an equidigital number, since it uses as much as digits as its factorization.

12015356365021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 12015356365021 in words is "twelve trillion, fifteen billion, three hundred fifty-six million, three hundred sixty-five thousand, twenty-one".