12251434421 has 8 divisors (see below), whose sum is σ = 12973091544. Its totient is φ = 11529886720.

The previous prime is 12251434417. The next prime is 12251434439. The reversal of 12251434421 is 12443415221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4832196196 + 7419238225 = 69514^2 + 86135^2 .

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 12251434421 - 2² = 12251434417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12251434411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 359981 + ... + 392541.

It is an arithmetic number, because the mean of its divisors is an integer number (1621636443).

Almost surely, 2^12251434421 is an apocalyptic number.

It is an amenable number.

12251434421 is a deficient number, since it is larger than the sum of its proper divisors (721657123).

12251434421 is a wasteful number, since it uses less digits than its factorization.

12251434421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54711.

The product of its digits is 7680, while the sum is 29.

Adding to 12251434421 its reverse (12443415221), we get a palindrome (24694849642).

The spelling of 12251434421 in words is "twelve billion, two hundred fifty-one million, four hundred thirty-four thousand, four hundred twenty-one".