21123302103 has 6 divisors (see below), whose sum is σ = 30511436384. Its totient is φ = 14082201396.

The previous prime is 21123302059. The next prime is 21123302107. The reversal of 21123302103 is 30120332112.

It is not a de Polignac number, because 21123302103 - 2¹⁴ = 21123285719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123302107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1173516775 + ... + 1173516792.

Almost surely, 2^21123302103 is an apocalyptic number.

21123302103 is a deficient number, since it is larger than the sum of its proper divisors (9388134281).

21123302103 is a wasteful number, since it uses less digits than its factorization.

21123302103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2347033573 (or 2347033570 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21123302103 its reverse (30120332112), we get a palindrome (51243634215).

The spelling of 21123302103 in words is "twenty-one billion, one hundred twenty-three million, three hundred two thousand, one hundred three".