12320121503 has 2 divisors, whose sum is σ = 12320121504. Its totient is φ = 12320121502.

The previous prime is 12320121497. The next prime is 12320121547. The reversal of 12320121503 is 30512102321.

It is a weak prime.

It is an emirp because it is prime and its reverse (30512102321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12320121503 - 2⁶ = 12320121439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12320121553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160060751 + 6160060752.

It is an arithmetic number, because the mean of its divisors is an integer number (6160060752).

Almost surely, 2^12320121503 is an apocalyptic number.

12320121503 is a deficient number, since it is larger than the sum of its proper divisors (1).

12320121503 is an equidigital number, since it uses as much as digits as its factorization.

12320121503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 20.

Adding to 12320121503 its reverse (30512102321), we get a palindrome (42832223824).

The spelling of 12320121503 in words is "twelve billion, three hundred twenty million, one hundred twenty-one thousand, five hundred three".