21121110201223 has 8 divisors (see below), whose sum is σ = 21294498225392. Its totient is φ = 20948214059136.

The previous prime is 21121110201211. The next prime is 21121110201239. The reversal of 21121110201223 is 32210201112112.

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-21121110201223 is a prime.

It is a super-2 number, since 2×21121110201223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21121110201223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121110201293) 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, 122884290 + ... + 123056047.

It is an arithmetic number, because the mean of its divisors is an integer number (2661812278174).

Almost surely, 2^{21121110201223} is an apocalyptic number.

21121110201223 is a deficient number, since it is larger than the sum of its proper divisors (173388024169).

21121110201223 is a wasteful number, since it uses less digits than its factorization.

21121110201223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245941041.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 21121110201223 its reverse (32210201112112), we get a palindrome (53331311313335).

The spelling of 21121110201223 in words is "twenty-one trillion, one hundred twenty-one billion, one hundred ten million, two hundred one thousand, two hundred twenty-three".