21234220003 has 2 divisors, whose sum is σ = 21234220004. Its totient is φ = 21234220002.

The previous prime is 21234220001. The next prime is 21234220027. The reversal of 21234220003 is 30002243212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21234220003 - 2¹ = 21234220001 is a prime.

Together with 21234220001, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21234220001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10617110001 + 10617110002.

It is an arithmetic number, because the mean of its divisors is an integer number (10617110002).

Almost surely, 2^21234220003 is an apocalyptic number.

21234220003 is a deficient number, since it is larger than the sum of its proper divisors (1).

21234220003 is an equidigital number, since it uses as much as digits as its factorization.

21234220003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 21234220003 its reverse (30002243212), we get a palindrome (51236463215).

The spelling of 21234220003 in words is "twenty-one billion, two hundred thirty-four million, two hundred twenty thousand, three".