20211321316003 has 2 divisors, whose sum is σ = 20211321316004. Its totient is φ = 20211321316002.

The previous prime is 20211321315901. The next prime is 20211321316013. The reversal of 20211321316003 is 30061312311202.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20211321316003 - 2⁹ = 20211321315491 is a prime.

It is not a weakly prime, because it can be changed into another prime (20211321316013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105660658001 + 10105660658002.

It is an arithmetic number, because the mean of its divisors is an integer number (10105660658002).

Almost surely, 2^{20211321316003} is an apocalyptic number.

20211321316003 is a deficient number, since it is larger than the sum of its proper divisors (1).

20211321316003 is an equidigital number, since it uses as much as digits as its factorization.

20211321316003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 20211321316003 its reverse (30061312311202), we get a palindrome (50272633627205).

The spelling of 20211321316003 in words is "twenty trillion, two hundred eleven billion, three hundred twenty-one million, three hundred sixteen thousand, three".