21211222120223 has 8 divisors (see below), whose sum is σ = 21317465782560. Its totient is φ = 21105225825120.

The previous prime is 21211222120211. The next prime is 21211222120237. The reversal of 21211222120223 is 32202122211212.

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 21211222120223 - 2¹² = 21211222116127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211222120243) 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, 61669883 + ... + 62012876.

It is an arithmetic number, because the mean of its divisors is an integer number (2664683222820).

Almost surely, 2^{21211222120223} is an apocalyptic number.

21211222120223 is a deficient number, since it is larger than the sum of its proper divisors (106243662337).

21211222120223 is a wasteful number, since it uses less digits than its factorization.

21211222120223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123683617.

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 21211222120223 its reverse (32202122211212), we get a palindrome (53413344331435).

The spelling of 21211222120223 in words is "twenty-one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred twenty thousand, two hundred twenty-three".