123312033221 has 16 divisors (see below), whose sum is σ = 140910404544. Its totient is φ = 106901324544.

The previous prime is 123312033167. The next prime is 123312033223. The reversal of 123312033221 is 122330213321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123312033221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123312033223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 494195 + ... + 700608.

It is an arithmetic number, because the mean of its divisors is an integer number (8806900284).

Almost surely, 2^123312033221 is an apocalyptic number.

It is an amenable number.

123312033221 is a deficient number, since it is larger than the sum of its proper divisors (17598371323).

123312033221 is a wasteful number, since it uses less digits than its factorization.

123312033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195300.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 123312033221 its reverse (122330213321), we get a palindrome (245642246542).

The spelling of 123312033221 in words is "one hundred twenty-three billion, three hundred twelve million, thirty-three thousand, two hundred twenty-one".