223121109 has 8 divisors (see below), whose sum is σ = 304413472. Its totient is φ = 145288080.

The previous prime is 223121081. The next prime is 223121117. The reversal of 223121109 is 901121322.

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

It is not a de Polignac number, because 223121109 - 2⁸ = 223120853 is a prime.

It is a super-3 number, since 3×223121109³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223121809) 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, 864682 + ... + 864939.

It is an arithmetic number, because the mean of its divisors is an integer number (38051684).

Almost surely, 2^223121109 is an apocalyptic number.

It is an amenable number.

223121109 is a deficient number, since it is larger than the sum of its proper divisors (81292363).

223121109 is a wasteful number, since it uses less digits than its factorization.

223121109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1729667.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 223121109 is about 14937.2390019039. The cubic root of 223121109 is about 606.5224584110.

The spelling of 223121109 in words is "two hundred twenty-three million, one hundred twenty-one thousand, one hundred nine".