12123110221 has 8 divisors (see below), whose sum is σ = 12171679488. Its totient is φ = 12074580000.

The previous prime is 12123110191. The next prime is 12123110239. The reversal of 12123110221 is 12201132121.

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 12123110221 - 2⁹ = 12123109709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12123110195 and 12123110204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123110281) 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, 719746 + ... + 736396.

It is an arithmetic number, because the mean of its divisors is an integer number (1521459936).

Almost surely, 2^12123110221 is an apocalyptic number.

It is an amenable number.

12123110221 is a deficient number, since it is larger than the sum of its proper divisors (48569267).

12123110221 is a wasteful number, since it uses less digits than its factorization.

12123110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19523.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 12123110221 its reverse (12201132121), we get a palindrome (24324242342).

The spelling of 12123110221 in words is "twelve billion, one hundred twenty-three million, one hundred ten thousand, two hundred twenty-one".