21100342143 has 8 divisors (see below), whose sum is σ = 28170188208. Its totient is φ = 14048695424.

The previous prime is 21100342127. The next prime is 21100342147. The reversal of 21100342143 is 34124300112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21100342143 - 2⁴ = 21100342127 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100342147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4547130 + ... + 4551767.

It is an arithmetic number, because the mean of its divisors is an integer number (3521273526).

Almost surely, 2^21100342143 is an apocalyptic number.

21100342143 is a deficient number, since it is larger than the sum of its proper divisors (7069846065).

21100342143 is an equidigital number, since it uses as much as digits as its factorization.

21100342143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9099673.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21100342143 its reverse (34124300112), we get a palindrome (55224642255).

The spelling of 21100342143 in words is "twenty-one billion, one hundred million, three hundred forty-two thousand, one hundred forty-three".