21102313003 has 2 divisors, whose sum is σ = 21102313004. Its totient is φ = 21102313002.

The previous prime is 21102312989. The next prime is 21102313019. The reversal of 21102313003 is 30031320112.

It is an a-pointer prime, because the next prime (21102313019) can be obtained adding 21102313003 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102313003 is a prime.

It is a super-2 number, since 2×21102313003² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21102310003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551156501 + 10551156502.

It is an arithmetic number, because the mean of its divisors is an integer number (10551156502).

Almost surely, 2^21102313003 is an apocalyptic number.

21102313003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102313003 is an equidigital number, since it uses as much as digits as its factorization.

21102313003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 21102313003 its reverse (30031320112), we get a palindrome (51133633115).

The spelling of 21102313003 in words is "twenty-one billion, one hundred two million, three hundred thirteen thousand, three".