223212123 has 6 divisors (see below), whose sum is σ = 322417524. Its totient is φ = 148808076.

The previous prime is 223212113. The next prime is 223212127. The reversal of 223212123 is 321212322.

It is not a de Polignac number, because 223212123 - 2¹⁷ = 223081051 is a prime.

It is a super-3 number, since 3×223212123³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 223212096 and 223212105.

It is not an unprimeable number, because it can be changed into a prime (223212127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12400665 + ... + 12400682.

It is an arithmetic number, because the mean of its divisors is an integer number (53736254).

Almost surely, 2^223212123 is an apocalyptic number.

223212123 is a deficient number, since it is larger than the sum of its proper divisors (99205401).

223212123 is a wasteful number, since it uses less digits than its factorization.

223212123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24801353 (or 24801350 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 223212123 is about 14940.2852382409. The cubic root of 223212123 is about 606.6049166644.

Adding to 223212123 its reverse (321212322), we get a palindrome (544424445).

The spelling of 223212123 in words is "two hundred twenty-three million, two hundred twelve thousand, one hundred twenty-three".