21013115003 has 2 divisors, whose sum is σ = 21013115004. Its totient is φ = 21013115002.

The previous prime is 21013114981. The next prime is 21013115033. The reversal of 21013115003 is 30051131012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21013115003 - 2⁸ = 21013114747 is a prime.

It is not a weakly prime, because it can be changed into another prime (21013115033) 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, 10506557501 + 10506557502.

It is an arithmetic number, because the mean of its divisors is an integer number (10506557502).

Almost surely, 2^21013115003 is an apocalyptic number.

21013115003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013115003 is an equidigital number, since it uses as much as digits as its factorization.

21013115003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90, while the sum is 17.

Adding to 21013115003 its reverse (30051131012), we get a palindrome (51064246015).

The spelling of 21013115003 in words is "twenty-one billion, thirteen million, one hundred fifteen thousand, three".