21100122143 has 8 divisors (see below), whose sum is σ = 21658456512. Its totient is φ = 20546346016.

The previous prime is 21100122133. The next prime is 21100122163. The reversal of 21100122143 is 34122100112.

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 21100122143 - 2²⁶ = 21033013279 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 (21100122133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1130180 + ... + 1148697.

It is an arithmetic number, because the mean of its divisors is an integer number (2707307064).

Almost surely, 2^21100122143 is an apocalyptic number.

21100122143 is a deficient number, since it is larger than the sum of its proper divisors (558334369).

21100122143 is a wasteful number, since it uses less digits than its factorization.

21100122143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2279121.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21100122143 its reverse (34122100112), we get a palindrome (55222222255).

The spelling of 21100122143 in words is "twenty-one billion, one hundred million, one hundred twenty-two thousand, one hundred forty-three".