223213121 has 8 divisors (see below), whose sum is σ = 235310400. Its totient is φ = 211150800.

The previous prime is 223213117. The next prime is 223213139. The reversal of 223213121 is 121312322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 223213121 - 2² = 223213117 is a prime.

It is a super-3 number, since 3×223213121³ (a number of 26 digits) contains 333 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 223213121.

It is not an unprimeable number, because it can be changed into a prime (223213171) 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, 4940 + ... + 21698.

It is an arithmetic number, because the mean of its divisors is an integer number (29413800).

Almost surely, 2^223213121 is an apocalyptic number.

It is an amenable number.

223213121 is a deficient number, since it is larger than the sum of its proper divisors (12097279).

223213121 is a wasteful number, since it uses less digits than its factorization.

223213121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17479.

The product of its digits is 144, while the sum is 17.

The square root of 223213121 is about 14940.3186378337. The cubic root of 223213121 is about 606.6058207234.

Adding to 223213121 its reverse (121312322), we get a palindrome (344525443).

The spelling of 223213121 in words is "two hundred twenty-three million, two hundred thirteen thousand, one hundred twenty-one".