21104143103 has 2 divisors, whose sum is σ = 21104143104. Its totient is φ = 21104143102.

The previous prime is 21104143069. The next prime is 21104143121. The reversal of 21104143103 is 30134140112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21104143103 - 2¹⁶ = 21104077567 is a prime.

It is a super-2 number, since 2×21104143103² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21104145103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10552071551 + 10552071552.

It is an arithmetic number, because the mean of its divisors is an integer number (10552071552).

Almost surely, 2^21104143103 is an apocalyptic number.

21104143103 is a deficient number, since it is larger than the sum of its proper divisors (1).

21104143103 is an equidigital number, since it uses as much as digits as its factorization.

21104143103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21104143103 its reverse (30134140112), we get a palindrome (51238283215).

The spelling of 21104143103 in words is "twenty-one billion, one hundred four million, one hundred forty-three thousand, one hundred three".