12203502821 has 2 divisors, whose sum is σ = 12203502822. Its totient is φ = 12203502820.

The previous prime is 12203502797. The next prime is 12203502907. The reversal of 12203502821 is 12820530221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8856880321 + 3346622500 = 94111^2 + 57850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12203502821 is a prime.

It is a super-2 number, since 2×12203502821² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12203502721) 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, 6101751410 + 6101751411.

It is an arithmetic number, because the mean of its divisors is an integer number (6101751411).

Almost surely, 2^12203502821 is an apocalyptic number.

It is an amenable number.

12203502821 is a deficient number, since it is larger than the sum of its proper divisors (1).

12203502821 is an equidigital number, since it uses as much as digits as its factorization.

12203502821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The spelling of 12203502821 in words is "twelve billion, two hundred three million, five hundred two thousand, eight hundred twenty-one".