12200032121 has 4 divisors (see below), whose sum is σ = 12211982244. Its totient is φ = 12188082000.

The previous prime is 12200032081. The next prime is 12200032123. The reversal of 12200032121 is 12123000221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5021706496 + 7178325625 = 70864^2 + 84725^2 .

It is a cyclic number.

It is not a de Polignac number, because 12200032121 - 2⁶ = 12200032057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12200032096 and 12200032105.

It is not an unprimeable number, because it can be changed into a prime (12200032123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5973530 + ... + 5975571.

It is an arithmetic number, because the mean of its divisors is an integer number (3052995561).

Almost surely, 2^12200032121 is an apocalyptic number.

It is an amenable number.

12200032121 is a deficient number, since it is larger than the sum of its proper divisors (11950123).

12200032121 is a wasteful number, since it uses less digits than its factorization.

12200032121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11950122.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 12200032121 its reverse (12123000221), we get a palindrome (24323032342).

The spelling of 12200032121 in words is "twelve billion, two hundred million, thirty-two thousand, one hundred twenty-one".