21103013223 has 36 divisors (see below), whose sum is σ = 32423043640. Its totient is φ = 13223782656.

The previous prime is 21103013213. The next prime is 21103013227. The reversal of 21103013223 is 32231030112.

It is not a de Polignac number, because 21103013223 - 2¹² = 21103009127 is a prime.

It is a super-2 number, since 2×21103013223² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21103013196 and 21103013205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103013227) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2151336 + ... + 2161122.

Almost surely, 2^21103013223 is an apocalyptic number.

21103013223 is a deficient number, since it is larger than the sum of its proper divisors (11320030417).

21103013223 is a wasteful number, since it uses less digits than its factorization.

21103013223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10656 (or 10636 counting only the distinct ones).

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

Adding to 21103013223 its reverse (32231030112), we get a palindrome (53334043335).

The spelling of 21103013223 in words is "twenty-one billion, one hundred three million, thirteen thousand, two hundred twenty-three".