123233211221 has 8 divisors (see below), whose sum is σ = 123519493944. Its totient is φ = 122947011520.

The previous prime is 123233211181. The next prime is 123233211281. The reversal of 123233211221 is 122112332321.

It can be written as a sum of positive squares in 4 ways, for example, as 8030668996 + 115202542225 = 89614^2 + 339415^2 .

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 123233211221 - 2¹⁰ = 123233210197 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123233211281) 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, 3725471 + ... + 3758403.

It is an arithmetic number, because the mean of its divisors is an integer number (15439936743).

Almost surely, 2^123233211221 is an apocalyptic number.

It is an amenable number.

123233211221 is a deficient number, since it is larger than the sum of its proper divisors (286282723).

123233211221 is an equidigital number, since it uses as much as digits as its factorization.

123233211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41511.

The product of its digits is 864, while the sum is 23.

Adding to 123233211221 its reverse (122112332321), we get a palindrome (245345543542).

The spelling of 123233211221 in words is "one hundred twenty-three billion, two hundred thirty-three million, two hundred eleven thousand, two hundred twenty-one".