21100120103323 has 8 divisors (see below), whose sum is σ = 22210696235520. Its totient is φ = 19989548320680.

The previous prime is 21100120103303. The next prime is 21100120103327. The reversal of 21100120103323 is 32330102100112.

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 21100120103323 - 2²⁹ = 21099583232411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21100120103323.

It is not an unprimeable number, because it can be changed into a prime (21100120103327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14889186 + ... + 16244632.

It is an arithmetic number, because the mean of its divisors is an integer number (2776337029440).

Almost surely, 2^{21100120103323} is an apocalyptic number.

21100120103323 is a deficient number, since it is larger than the sum of its proper divisors (1110576132197).

21100120103323 is a wasteful number, since it uses less digits than its factorization.

21100120103323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2174777.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21100120103323 its reverse (32330102100112), we get a palindrome (53430222203435).

The spelling of 21100120103323 in words is "twenty-one trillion, one hundred billion, one hundred twenty million, one hundred three thousand, three hundred twenty-three".