21242020020223 has 8 divisors (see below), whose sum is σ = 21461598626816. Its totient is φ = 21023479611000.

The previous prime is 21242020020131. The next prime is 21242020020227. The reversal of 21242020020223 is 32202002024212.

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-21242020020223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21242020020194 and 21242020020203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21242020020227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259508211 + ... + 259590052.

It is an arithmetic number, because the mean of its divisors is an integer number (2682699828352).

Almost surely, 2^{21242020020223} is an apocalyptic number.

21242020020223 is a deficient number, since it is larger than the sum of its proper divisors (219578606593).

21242020020223 is a wasteful number, since it uses less digits than its factorization.

21242020020223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 519098685.

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 21242020020223 its reverse (32202002024212), we get a palindrome (53444022044435).

The spelling of 21242020020223 in words is "twenty-one trillion, two hundred forty-two billion, twenty million, twenty thousand, two hundred twenty-three".