12162242621 has 2 divisors, whose sum is σ = 12162242622. Its totient is φ = 12162242620.

The previous prime is 12162242467. The next prime is 12162242639. The reversal of 12162242621 is 12624226121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7450106596 + 4712136025 = 86314^2 + 68645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12162242621 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12162242321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6081121310 + 6081121311.

It is an arithmetic number, because the mean of its divisors is an integer number (6081121311).

Almost surely, 2^12162242621 is an apocalyptic number.

It is an amenable number.

12162242621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12162242621 is an equidigital number, since it uses as much as digits as its factorization.

12162242621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

Adding to 12162242621 its reverse (12624226121), we get a palindrome (24786468742).

The spelling of 12162242621 in words is "twelve billion, one hundred sixty-two million, two hundred forty-two thousand, six hundred twenty-one".