1421013231257 has 2 divisors, whose sum is σ = 1421013231258. Its totient is φ = 1421013231256.

The previous prime is 1421013231227. The next prime is 1421013231263. The reversal of 1421013231257 is 7521323101241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142613482761 + 278399748496 = 1068931^2 + 527636^2 .

It is an emirp because it is prime and its reverse (7521323101241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1421013231257 - 2⁶ = 1421013231193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1421013231227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 710506615628 + 710506615629.

It is an arithmetic number, because the mean of its divisors is an integer number (710506615629).

Almost surely, 2^{1421013231257} is an apocalyptic number.

It is an amenable number.

1421013231257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1421013231257 is an equidigital number, since it uses as much as digits as its factorization.

1421013231257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 32.

Adding to 1421013231257 its reverse (7521323101241), we get a palindrome (8942336332498).

The spelling of 1421013231257 in words is "one trillion, four hundred twenty-one billion, thirteen million, two hundred thirty-one thousand, two hundred fifty-seven".