21321211023323 has 4 divisors (see below), whose sum is σ = 21321263238600. Its totient is φ = 21321158808048.

The previous prime is 21321211023317. The next prime is 21321211023347. The reversal of 21321211023323 is 32332011212312.

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 21321211023323 - 2²² = 21321206829019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321211023292 and 21321211023301.

It is not an unprimeable number, because it can be changed into a prime (21321211023923) 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, 25490273 + ... + 26313426.

It is an arithmetic number, because the mean of its divisors is an integer number (5330315809650).

Almost surely, 2^{21321211023323} is an apocalyptic number.

21321211023323 is a deficient number, since it is larger than the sum of its proper divisors (52215277).

21321211023323 is an equidigital number, since it uses as much as digits as its factorization.

21321211023323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52215276.

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 21321211023323 its reverse (32332011212312), we get a palindrome (53653222235635).

The spelling of 21321211023323 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred eleven million, twenty-three thousand, three hundred twenty-three".