21022303223 has 8 divisors (see below), whose sum is σ = 21545135136. Its totient is φ = 20499952000.

The previous prime is 21022303219. The next prime is 21022303271. The reversal of 21022303223 is 32230322012.

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

It is a cyclic number.

It is not a de Polignac number, because 21022303223 - 2² = 21022303219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21022303195 and 21022303204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022303123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30803 + ... + 207348.

It is an arithmetic number, because the mean of its divisors is an integer number (2693141892).

Almost surely, 2^21022303223 is an apocalyptic number.

21022303223 is a deficient number, since it is larger than the sum of its proper divisors (522831913).

21022303223 is a wasteful number, since it uses less digits than its factorization.

21022303223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240345.

The product of its (nonzero) digits is 864, while the sum is 20.

Adding to 21022303223 its reverse (32230322012), we get a palindrome (53252625235).

The spelling of 21022303223 in words is "twenty-one billion, twenty-two million, three hundred three thousand, two hundred twenty-three".