12450421121 has 8 divisors (see below), whose sum is σ = 13191655464. Its totient is φ = 11710170880.

The previous prime is 12450421103. The next prime is 12450421147. The reversal of 12450421121 is 12112405421.

It can be written as a sum of positive squares in 4 ways, for example, as 8044116721 + 4406304400 = 89689^2 + 66380^2 .

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 12450421121 - 2⁶ = 12450421057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12450421421) 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, 219890 + ... + 270651.

It is an arithmetic number, because the mean of its divisors is an integer number (1648956933).

Almost surely, 2^12450421121 is an apocalyptic number.

It is an amenable number.

12450421121 is a deficient number, since it is larger than the sum of its proper divisors (741234343).

12450421121 is a wasteful number, since it uses less digits than its factorization.

12450421121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492051.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 12450421121 its reverse (12112405421), we get a palindrome (24562826542).

The spelling of 12450421121 in words is "twelve billion, four hundred fifty million, four hundred twenty-one thousand, one hundred twenty-one".