12250442621 has 2 divisors, whose sum is σ = 12250442622. Its totient is φ = 12250442620.

The previous prime is 12250442509. The next prime is 12250442627. The reversal of 12250442621 is 12624405221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11276316100 + 974126521 = 106190^2 + 31211^2 .

It is a cyclic number.

It is not a de Polignac number, because 12250442621 - 2¹⁰ = 12250441597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12250442627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6125221310 + 6125221311.

It is an arithmetic number, because the mean of its divisors is an integer number (6125221311).

Almost surely, 2^12250442621 is an apocalyptic number.

It is an amenable number.

12250442621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12250442621 is an equidigital number, since it uses as much as digits as its factorization.

12250442621 is an evil number, because the sum of its binary digits is even.

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

Adding to 12250442621 its reverse (12624405221), we get a palindrome (24874847842).

The spelling of 12250442621 in words is "twelve billion, two hundred fifty million, four hundred forty-two thousand, six hundred twenty-one".