125444053421 has 2 divisors, whose sum is σ = 125444053422. Its totient is φ = 125444053420.

The previous prime is 125444053403. The next prime is 125444053447. The reversal of 125444053421 is 124350444521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125376895396 + 67158025 = 354086^2 + 8195^2 .

It is a cyclic number.

It is not a de Polignac number, because 125444053421 - 2¹⁰ = 125444052397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125444053121) 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 as a sum of consecutive naturals, namely, 62722026710 + 62722026711.

It is an arithmetic number, because the mean of its divisors is an integer number (62722026711).

Almost surely, 2^125444053421 is an apocalyptic number.

It is an amenable number.

125444053421 is a deficient number, since it is larger than the sum of its proper divisors (1).

125444053421 is an equidigital number, since it uses as much as digits as its factorization.

125444053421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 125444053421 its reverse (124350444521), we get a palindrome (249794497942).

The spelling of 125444053421 in words is "one hundred twenty-five billion, four hundred forty-four million, fifty-three thousand, four hundred twenty-one".