123033221 has 2 divisors, whose sum is σ = 123033222. Its totient is φ = 123033220.

The previous prime is 123033217. The next prime is 123033247. The reversal of 123033221 is 122330321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119464900 + 3568321 = 10930^2 + 1889^2 .

It is an emirp because it is prime and its reverse (122330321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123033221 - 2² = 123033217 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123033221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (123033271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61516610 + 61516611.

It is an arithmetic number, because the mean of its divisors is an integer number (61516611).

Almost surely, 2^123033221 is an apocalyptic number.

It is an amenable number.

123033221 is a deficient number, since it is larger than the sum of its proper divisors (1).

123033221 is an equidigital number, since it uses as much as digits as its factorization.

123033221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 123033221 is about 11092.0341236403. The cubic root of 123033221 is about 497.3637528302.

Adding to 123033221 its reverse (122330321), we get a palindrome (245363542).

The spelling of 123033221 in words is "one hundred twenty-three million, thirty-three thousand, two hundred twenty-one".