21312130022003 has 2 divisors, whose sum is σ = 21312130022004. Its totient is φ = 21312130022002.

The previous prime is 21312130021937. The next prime is 21312130022021. The reversal of 21312130022003 is 30022003121312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21312130022003 - 2³⁰ = 21311056280179 is a prime.

It is not a weakly prime, because it can be changed into another prime (21312130022063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10656065011001 + 10656065011002.

It is an arithmetic number, because the mean of its divisors is an integer number (10656065011002).

Almost surely, 2^{21312130022003} is an apocalyptic number.

21312130022003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21312130022003 is an equidigital number, since it uses as much as digits as its factorization.

21312130022003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21312130022003 its reverse (30022003121312), we get a palindrome (51334133143315).

The spelling of 21312130022003 in words is "twenty-one trillion, three hundred twelve billion, one hundred thirty million, twenty-two thousand, three".