21311327003 has 2 divisors, whose sum is σ = 21311327004. Its totient is φ = 21311327002.

The previous prime is 21311326997. The next prime is 21311327027. The reversal of 21311327003 is 30072311312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21311327003 - 2¹⁰ = 21311325979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21311327003.

It is not a weakly prime, because it can be changed into another prime (21311327033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10655663501 + 10655663502.

It is an arithmetic number, because the mean of its divisors is an integer number (10655663502).

Almost surely, 2^21311327003 is an apocalyptic number.

21311327003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21311327003 is an equidigital number, since it uses as much as digits as its factorization.

21311327003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 756, while the sum is 23.

Adding to 21311327003 its reverse (30072311312), we get a palindrome (51383638315).

The spelling of 21311327003 in words is "twenty-one billion, three hundred eleven million, three hundred twenty-seven thousand, three".