21120330103 has 12 divisors (see below), whose sum is σ = 22473799920. Its totient is φ = 19844275712.

The previous prime is 21120330073. The next prime is 21120330113. The reversal of 21120330103 is 30103302112.

It is a de Polignac number, because none of the positive numbers 2^k-21120330103 is a prime.

It is a super-3 number, since 3×21120330103³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120330113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109758 + ... + 232996.

It is an arithmetic number, because the mean of its divisors is an integer number (1872816660).

Almost surely, 2^21120330103 is an apocalyptic number.

21120330103 is a deficient number, since it is larger than the sum of its proper divisors (1353469817).

21120330103 is a wasteful number, since it uses less digits than its factorization.

21120330103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123866 (or 123849 counting only the distinct ones).

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

Adding to 21120330103 its reverse (30103302112), we get a palindrome (51223632215).

The spelling of 21120330103 in words is "twenty-one billion, one hundred twenty million, three hundred thirty thousand, one hundred three".