12250421501 has 4 divisors (see below), whose sum is σ = 12581514012. Its totient is φ = 11919328992.

The previous prime is 12250421479. The next prime is 12250421507. The reversal of 12250421501 is 10512405221.

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 5373036601 + 6877384900 = 73301^2 + 82930^2 .

It is a cyclic number.

It is not a de Polignac number, because 12250421501 - 2¹⁴ = 12250405117 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 (12250421507) 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, 165546200 + ... + 165546273.

It is an arithmetic number, because the mean of its divisors is an integer number (3145378503).

Almost surely, 2^12250421501 is an apocalyptic number.

It is an amenable number.

12250421501 is a deficient number, since it is larger than the sum of its proper divisors (331092511).

12250421501 is an equidigital number, since it uses as much as digits as its factorization.

12250421501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331092510.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 12250421501 its reverse (10512405221), we get a palindrome (22762826722).

The spelling of 12250421501 in words is "twelve billion, two hundred fifty million, four hundred twenty-one thousand, five hundred one".