21230012003 has 2 divisors, whose sum is σ = 21230012004. Its totient is φ = 21230012002.

The previous prime is 21230011997. The next prime is 21230012009. The reversal of 21230012003 is 30021003212.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (21230011997) and next prime (21230012009).

It is a cyclic number.

It is not a de Polignac number, because 21230012003 - 2¹⁶ = 21229946467 is a prime.

It is not a weakly prime, because it can be changed into another prime (21230012009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615006001 + 10615006002.

It is an arithmetic number, because the mean of its divisors is an integer number (10615006002).

Almost surely, 2^21230012003 is an apocalyptic number.

21230012003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230012003 is an equidigital number, since it uses as much as digits as its factorization.

21230012003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 21230012003 its reverse (30021003212), we get a palindrome (51251015215).

The spelling of 21230012003 in words is "twenty-one billion, two hundred thirty million, twelve thousand, three".