21104134211143 has 48 divisors (see below), whose sum is σ = 22991756401152. Its totient is φ = 19303464960000.

The previous prime is 21104134211123. The next prime is 21104134211197. The reversal of 21104134211143 is 34111243140112.

It is not a de Polignac number, because 21104134211143 - 2⁹ = 21104134210631 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 (21104134211123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2198113543 + ... + 2198123143.

It is an arithmetic number, because the mean of its divisors is an integer number (478994925024).

Almost surely, 2^{21104134211143} is an apocalyptic number.

21104134211143 is a deficient number, since it is larger than the sum of its proper divisors (1887622190009).

21104134211143 is a wasteful number, since it uses less digits than its factorization.

21104134211143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10156 (or 10103 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

Adding to 21104134211143 its reverse (34111243140112), we get a palindrome (55215377351255).

The spelling of 21104134211143 in words is "twenty-one trillion, one hundred four billion, one hundred thirty-four million, two hundred eleven thousand, one hundred forty-three".