21202212202223 has 16 divisors (see below), whose sum is σ = 22855838294016. Its totient is φ = 19551831333600.

The previous prime is 21202212202169. The next prime is 21202212202231. The reversal of 21202212202223 is 32220221220212.

It is a cyclic number.

It is not a de Polignac number, because 21202212202223 - 2¹⁰ = 21202212201199 is a prime.

It is a super-3 number, since 3×21202212202223³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202212204223) 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 15 ways as a sum of consecutive naturals, for example, 125949236 + ... + 126117462.

It is an arithmetic number, because the mean of its divisors is an integer number (1428489893376).

Almost surely, 2^{21202212202223} is an apocalyptic number.

21202212202223 is a deficient number, since it is larger than the sum of its proper divisors (1653626091793).

21202212202223 is a wasteful number, since it uses less digits than its factorization.

21202212202223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177814.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 21202212202223 its reverse (32220221220212), we get a palindrome (53422433422435).

The spelling of 21202212202223 in words is "twenty-one trillion, two hundred two billion, two hundred twelve million, two hundred two thousand, two hundred twenty-three".