12152235421 has 2 divisors, whose sum is σ = 12152235422. Its totient is φ = 12152235420.

The previous prime is 12152235413. The next prime is 12152235427. The reversal of 12152235421 is 12453225121.

It is a happy number.

12152235421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6464964025 + 5687271396 = 80405^2 + 75414^2 .

It is an emirp because it is prime and its reverse (12453225121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12152235421 - 2³ = 12152235413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12152235421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12152235427) 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 as a sum of consecutive naturals, namely, 6076117710 + 6076117711.

It is an arithmetic number, because the mean of its divisors is an integer number (6076117711).

Almost surely, 2^12152235421 is an apocalyptic number.

It is an amenable number.

12152235421 is a deficient number, since it is larger than the sum of its proper divisors (1).

12152235421 is an equidigital number, since it uses as much as digits as its factorization.

12152235421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4800, while the sum is 28.

The spelling of 12152235421 in words is "twelve billion, one hundred fifty-two million, two hundred thirty-five thousand, four hundred twenty-one".