12250435443221 has 4 divisors (see below), whose sum is σ = 12278858727744. Its totient is φ = 12222012158700.

The previous prime is 12250435443143. The next prime is 12250435443269. The reversal of 12250435443221 is 12234453405221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12250435443221 - 2¹⁴ = 12250435426837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12250435443271) 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, 14211641615 + ... + 14211642476.

It is an arithmetic number, because the mean of its divisors is an integer number (3069714681936).

Almost surely, 2^{12250435443221} is an apocalyptic number.

It is an amenable number.

12250435443221 is a deficient number, since it is larger than the sum of its proper divisors (28423284523).

12250435443221 is an equidigital number, since it uses as much as digits as its factorization.

12250435443221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28423284522.

The product of its (nonzero) digits is 230400, while the sum is 38.

Adding to 12250435443221 its reverse (12234453405221), we get a palindrome (24484888848442).

The spelling of 12250435443221 in words is "twelve trillion, two hundred fifty billion, four hundred thirty-five million, four hundred forty-three thousand, two hundred twenty-one".