21021202311223 has 8 divisors (see below), whose sum is σ = 21428514172800. Its totient is φ = 20615591126328.

The previous prime is 21021202311211. The next prime is 21021202311257. The reversal of 21021202311223 is 32211320212012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021202311223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021202311194 and 21021202311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21021202311283) 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 7 ways as a sum of consecutive naturals, for example, 425144211 + ... + 425193652.

It is an arithmetic number, because the mean of its divisors is an integer number (2678564271600).

Almost surely, 2^{21021202311223} is an apocalyptic number.

21021202311223 is a deficient number, since it is larger than the sum of its proper divisors (407311861577).

21021202311223 is an equidigital number, since it uses as much as digits as its factorization.

21021202311223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850338341.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 21021202311223 its reverse (32211320212012), we get a palindrome (53232522523235).

The spelling of 21021202311223 in words is "twenty-one trillion, twenty-one billion, two hundred two million, three hundred eleven thousand, two hundred twenty-three".