21323030020123 has 24 divisors (see below), whose sum is σ = 23160802314240. Its totient is φ = 19621992630240.

The previous prime is 21323030020073. The next prime is 21323030020147. The reversal of 21323030020123 is 32102003032312.

It is a de Polignac number, because none of the positive numbers 2^k-21323030020123 is a prime.

It is a super-3 number, since 3×21323030020123³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323030020094 and 21323030020103.

It is not an unprimeable number, because it can be changed into a prime (21323030020183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205683540 + ... + 205787182.

It is an arithmetic number, because the mean of its divisors is an integer number (965033429760).

Almost surely, 2^{21323030020123} is an apocalyptic number.

21323030020123 is a deficient number, since it is larger than the sum of its proper divisors (1837772294117).

21323030020123 is a wasteful number, since it uses less digits than its factorization.

21323030020123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107419 (or 107406 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21323030020123 its reverse (32102003032312), we get a palindrome (53425033052435).

The spelling of 21323030020123 in words is "twenty-one trillion, three hundred twenty-three billion, thirty million, twenty thousand, one hundred twenty-three".