21104142103 has 16 divisors (see below), whose sum is σ = 23749202304. Its totient is φ = 18584739360.

The previous prime is 21104142097. The next prime is 21104142107. The reversal of 21104142103 is 30124140112.

It is not a de Polignac number, because 21104142103 - 2⁵ = 21104142071 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 (21104142107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21825 + ... + 206602.

It is an arithmetic number, because the mean of its divisors is an integer number (1484325144).

Almost surely, 2^21104142103 is an apocalyptic number.

21104142103 is a deficient number, since it is larger than the sum of its proper divisors (2645060201).

21104142103 is a wasteful number, since it uses less digits than its factorization.

21104142103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228702.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 21104142103 its reverse (30124140112), we get a palindrome (51228282215).

The spelling of 21104142103 in words is "twenty-one billion, one hundred four million, one hundred forty-two thousand, one hundred three".