1223303563021 has 2 divisors, whose sum is σ = 1223303563022. Its totient is φ = 1223303563020.

The previous prime is 1223303563019. The next prime is 1223303563033. The reversal of 1223303563021 is 1203653033221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1044717028996 + 178586534025 = 1022114^2 + 422595^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223303563021 - 2¹ = 1223303563019 is a prime.

Together with 1223303563019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1223303563061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611651781510 + 611651781511.

It is an arithmetic number, because the mean of its divisors is an integer number (611651781511).

Almost surely, 2^{1223303563021} is an apocalyptic number.

It is an amenable number.

1223303563021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223303563021 is an equidigital number, since it uses as much as digits as its factorization.

1223303563021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 31.

Adding to 1223303563021 its reverse (1203653033221), we get a palindrome (2426956596242).

The spelling of 1223303563021 in words is "one trillion, two hundred twenty-three billion, three hundred three million, five hundred sixty-three thousand, twenty-one".