21000313331003 has 2 divisors, whose sum is σ = 21000313331004. Its totient is φ = 21000313331002.

The previous prime is 21000313330999. The next prime is 21000313331009. The reversal of 21000313331003 is 30013331300012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000313331003 - 2² = 21000313330999 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000313331009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500156665501 + 10500156665502.

It is an arithmetic number, because the mean of its divisors is an integer number (10500156665502).

Almost surely, 2^{21000313331003} is an apocalyptic number.

21000313331003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000313331003 is an equidigital number, since it uses as much as digits as its factorization.

21000313331003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21000313331003 its reverse (30013331300012), we get a palindrome (51013644631015).

The spelling of 21000313331003 in words is "twenty-one trillion, three hundred thirteen million, three hundred thirty-one thousand, three".