12450203021 has 2 divisors, whose sum is σ = 12450203022. Its totient is φ = 12450203020.

The previous prime is 12450203009. The next prime is 12450203089. The reversal of 12450203021 is 12030205421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10365276100 + 2084926921 = 101810^2 + 45661^2 .

It is a cyclic number.

It is not a de Polignac number, because 12450203021 - 2⁶ = 12450202957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12450202984 and 12450203002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12450203921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6225101510 + 6225101511.

It is an arithmetic number, because the mean of its divisors is an integer number (6225101511).

Almost surely, 2^12450203021 is an apocalyptic number.

It is an amenable number.

12450203021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12450203021 is an equidigital number, since it uses as much as digits as its factorization.

12450203021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 12450203021 its reverse (12030205421), we get a palindrome (24480408442).

The spelling of 12450203021 in words is "twelve billion, four hundred fifty million, two hundred three thousand, twenty-one".