21313010000123 has 16 divisors (see below), whose sum is σ = 22271878622016. Its totient is φ = 20356833277440.

The previous prime is 21313010000119. The next prime is 21313010000141. The reversal of 21313010000123 is 32100001031312.

It is a cyclic number.

It is not a de Polignac number, because 21313010000123 - 2² = 21313010000119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21313010000173) 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 15 ways as a sum of consecutive naturals, for example, 136743065 + ... + 136898837.

It is an arithmetic number, because the mean of its divisors is an integer number (1391992413876).

Almost surely, 2^{21313010000123} is an apocalyptic number.

21313010000123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21313010000123 is a deficient number, since it is larger than the sum of its proper divisors (958868621893).

21313010000123 is a wasteful number, since it uses less digits than its factorization.

21313010000123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164374.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 21313010000123 its reverse (32100001031312), we get a palindrome (53413011031435).

The spelling of 21313010000123 in words is "twenty-one trillion, three hundred thirteen billion, ten million, one hundred twenty-three", and thus it is an aban number.