12563362121 has 2 divisors, whose sum is σ = 12563362122. Its totient is φ = 12563362120.

The previous prime is 12563362103. The next prime is 12563362129. The reversal of 12563362121 is 12126336521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9355725625 + 3207636496 = 96725^2 + 56636^2 .

It is a cyclic number.

It is not a de Polignac number, because 12563362121 - 2⁶ = 12563362057 is a prime.

It is not a weakly prime, because it can be changed into another prime (12563362129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6281681060 + 6281681061.

It is an arithmetic number, because the mean of its divisors is an integer number (6281681061).

Almost surely, 2^12563362121 is an apocalyptic number.

It is an amenable number.

12563362121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12563362121 is an equidigital number, since it uses as much as digits as its factorization.

12563362121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 32.

Adding to 12563362121 its reverse (12126336521), we get a palindrome (24689698642).

The spelling of 12563362121 in words is "twelve billion, five hundred sixty-three million, three hundred sixty-two thousand, one hundred twenty-one".