21402312041323 has 4 divisors (see below), whose sum is σ = 21405059810320. Its totient is φ = 21399564272328.

The previous prime is 21402312041311. The next prime is 21402312041329. The reversal of 21402312041323 is 32314021320412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21402312041323 - 2¹⁷ = 21402311910251 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21402312041291 and 21402312041300.

It is not an unprimeable number, because it can be changed into a prime (21402312041329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1373872815 + ... + 1373888392.

It is an arithmetic number, because the mean of its divisors is an integer number (5351264952580).

Almost surely, 2^{21402312041323} is an apocalyptic number.

21402312041323 is a deficient number, since it is larger than the sum of its proper divisors (2747768997).

21402312041323 is an equidigital number, since it uses as much as digits as its factorization.

21402312041323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747768996.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21402312041323 its reverse (32314021320412), we get a palindrome (53716333361735).

The spelling of 21402312041323 in words is "twenty-one trillion, four hundred two billion, three hundred twelve million, forty-one thousand, three hundred twenty-three".