223122212121 has 8 divisors (see below), whose sum is σ = 301262058880. Its totient is φ = 146865253392.

The previous prime is 223122212081. The next prime is 223122212147. The reversal of 223122212121 is 121212221322.

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

It is not a de Polignac number, because 223122212121 - 2¹⁸ = 223121949977 is a prime.

It is a super-3 number, since 3×223122212121³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (223122214121) 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, 470721730 + ... + 470722203.

It is an arithmetic number, because the mean of its divisors is an integer number (37657757360).

Almost surely, 2^223122212121 is an apocalyptic number.

It is an amenable number.

223122212121 is a deficient number, since it is larger than the sum of its proper divisors (78139846759).

223122212121 is an equidigital number, since it uses as much as digits as its factorization.

223122212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941444015.

The product of its digits is 384, while the sum is 21.

Adding to 223122212121 its reverse (121212221322), we get a palindrome (344334433443).

The spelling of 223122212121 in words is "two hundred twenty-three billion, one hundred twenty-two million, two hundred twelve thousand, one hundred twenty-one".