21030323103 has 12 divisors (see below), whose sum is σ = 30379107408. Its totient is φ = 14019304320.

The previous prime is 21030323051. The next prime is 21030323123. The reversal of 21030323103 is 30132303012.

21030323103 is a `hidden beast` number, since 210 + 30 + 323 + 103 = 666.

It is not a de Polignac number, because 21030323103 - 2⁸ = 21030322847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21030323123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89158 + ... + 223628.

It is an arithmetic number, because the mean of its divisors is an integer number (2531592284).

Almost surely, 2^21030323103 is an apocalyptic number.

21030323103 is a deficient number, since it is larger than the sum of its proper divisors (9348784305).

21030323103 is a wasteful number, since it uses less digits than its factorization.

21030323103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151854 (or 151851 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21030323103 its reverse (30132303012), we get a palindrome (51162626115).

The spelling of 21030323103 in words is "twenty-one billion, thirty million, three hundred twenty-three thousand, one hundred three".