223121211223 has 2 divisors, whose sum is σ = 223121211224. Its totient is φ = 223121211222.

The previous prime is 223121211197. The next prime is 223121211239. The reversal of 223121211223 is 322112121322.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-223121211223 is a prime.

It is a super-3 number, since 3×223121211223³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223121211194 and 223121211203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (223121211253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111560605611 + 111560605612.

It is an arithmetic number, because the mean of its divisors is an integer number (111560605612).

Almost surely, 2^223121211223 is an apocalyptic number.

223121211223 is a deficient number, since it is larger than the sum of its proper divisors (1).

223121211223 is an equidigital number, since it uses as much as digits as its factorization.

223121211223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

Adding to 223121211223 its reverse (322112121322), we get a palindrome (545233332545).

The spelling of 223121211223 in words is "two hundred twenty-three billion, one hundred twenty-one million, two hundred eleven thousand, two hundred twenty-three".