21130230103 has 2 divisors, whose sum is σ = 21130230104. Its totient is φ = 21130230102.

The previous prime is 21130230101. The next prime is 21130230109. The reversal of 21130230103 is 30103203112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21130230103 - 2¹ = 21130230101 is a prime.

Together with 21130230101, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21130230101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10565115051 + 10565115052.

It is an arithmetic number, because the mean of its divisors is an integer number (10565115052).

Almost surely, 2^21130230103 is an apocalyptic number.

21130230103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21130230103 is an equidigital number, since it uses as much as digits as its factorization.

21130230103 is an evil number, because the sum of its binary digits is even.

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

Adding to 21130230103 its reverse (30103203112), we get a palindrome (51233433215).

The spelling of 21130230103 in words is "twenty-one billion, one hundred thirty million, two hundred thirty thousand, one hundred three".