21303100122123 has 32 divisors (see below), whose sum is σ = 29803582162944. Its totient is φ = 13517480160000.

The previous prime is 21303100122041. The next prime is 21303100122191. The reversal of 21303100122123 is 32122100130312.

It is not a de Polignac number, because 21303100122123 - 2¹⁷ = 21303099991051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21303100122123.

It is not an unprimeable number, because it can be changed into a prime (21303100122323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69517228 + ... + 69822998.

It is an arithmetic number, because the mean of its divisors is an integer number (931361942592).

Almost surely, 2^{21303100122123} is an apocalyptic number.

21303100122123 is a deficient number, since it is larger than the sum of its proper divisors (8500482040821).

21303100122123 is a wasteful number, since it uses less digits than its factorization.

21303100122123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318147.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21303100122123 its reverse (32122100130312), we get a palindrome (53425200252435).

The spelling of 21303100122123 in words is "twenty-one trillion, three hundred three billion, one hundred million, one hundred twenty-two thousand, one hundred twenty-three".