21104103331 has 6 divisors (see below), whose sum is σ = 22418546060. Its totient is φ = 19862685216.

The previous prime is 21104103323. The next prime is 21104103341. The reversal of 21104103331 is 13330140112.

It is not a de Polignac number, because 21104103331 - 2³ = 21104103323 is a prime.

It is a super-2 number, since 2×21104103331² (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 = 21104103299 and 21104103308.

It is not an unprimeable number, because it can be changed into a prime (21104103311) 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, 36512001 + ... + 36512578.

Almost surely, 2^21104103331 is an apocalyptic number.

21104103331 is a deficient number, since it is larger than the sum of its proper divisors (1314442729).

21104103331 is an equidigital number, since it uses as much as digits as its factorization.

21104103331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73024613 (or 73024596 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21104103331 its reverse (13330140112), we get a palindrome (34434243443).

The spelling of 21104103331 in words is "twenty-one billion, one hundred four million, one hundred three thousand, three hundred thirty-one".