12103033221 has 6 divisors (see below), whose sum is σ = 17482159110. Its totient is φ = 8068688808.

The previous prime is 12103033213. The next prime is 12103033279. The reversal of 12103033221 is 12233030121.

It can be written as a sum of positive squares in only one way, i.e., 8740193121 + 3362840100 = 93489^2 + 57990^2 .

It is not a de Polignac number, because 12103033221 - 2³ = 12103033213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12103033194 and 12103033203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12103043221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 672390726 + ... + 672390743.

It is an arithmetic number, because the mean of its divisors is an integer number (2913693185).

Almost surely, 2^12103033221 is an apocalyptic number.

It is an amenable number.

12103033221 is a deficient number, since it is larger than the sum of its proper divisors (5379125889).

12103033221 is a wasteful number, since it uses less digits than its factorization.

12103033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344781475 (or 1344781472 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12103033221 its reverse (12233030121), we get a palindrome (24336063342).

The spelling of 12103033221 in words is "twelve billion, one hundred three million, thirty-three thousand, two hundred twenty-one".