223212231221 has 8 divisors (see below), whose sum is σ = 255468873024. Its totient is φ = 191047884480.

The previous prime is 223212231217. The next prime is 223212231343. The reversal of 223212231221 is 122132212322.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 223212231221 - 2² = 223212231217 is a prime.

It is a super-3 number, since 3×223212231221³ (a number of 35 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 (223212231521) 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, 23068580 + ... + 23078253.

It is an arithmetic number, because the mean of its divisors is an integer number (31933609128).

Almost surely, 2^223212231221 is an apocalyptic number.

It is an amenable number.

223212231221 is a deficient number, since it is larger than the sum of its proper divisors (32256641803).

223212231221 is an equidigital number, since it uses as much as digits as its factorization.

223212231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46147531.

The product of its digits is 1152, while the sum is 23.

Adding to 223212231221 its reverse (122132212322), we get a palindrome (345344443543).

The spelling of 223212231221 in words is "two hundred twenty-three billion, two hundred twelve million, two hundred thirty-one thousand, two hundred twenty-one".