1231421414257 has 2 divisors, whose sum is σ = 1231421414258. Its totient is φ = 1231421414256.

The previous prime is 1231421414221. The next prime is 1231421414263. The reversal of 1231421414257 is 7524141241321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894993573681 + 336427840576 = 946041^2 + 580024^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231421414257 - 2¹⁹ = 1231420889969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231421418257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615710707128 + 615710707129.

It is an arithmetic number, because the mean of its divisors is an integer number (615710707129).

Almost surely, 2^{1231421414257} is an apocalyptic number.

It is an amenable number.

1231421414257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231421414257 is an equidigital number, since it uses as much as digits as its factorization.

1231421414257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 53760, while the sum is 37.

Adding to 1231421414257 its reverse (7524141241321), we get a palindrome (8755562655578).

The spelling of 1231421414257 in words is "one trillion, two hundred thirty-one billion, four hundred twenty-one million, four hundred fourteen thousand, two hundred fifty-seven".