1256724630101 has 2 divisors, whose sum is σ = 1256724630102. Its totient is φ = 1256724630100.

The previous prime is 1256724630089. The next prime is 1256724630151. The reversal of 1256724630101 is 1010364276521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199233059025 + 57491571076 = 1095095^2 + 239774^2 .

It is a cyclic number.

It is not a de Polignac number, because 1256724630101 - 2¹⁴ = 1256724613717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256724630151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628362315050 + 628362315051.

It is an arithmetic number, because the mean of its divisors is an integer number (628362315051).

Almost surely, 2^{1256724630101} is an apocalyptic number.

It is an amenable number.

1256724630101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256724630101 is an equidigital number, since it uses as much as digits as its factorization.

1256724630101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 1256724630101 in words is "one trillion, two hundred fifty-six billion, seven hundred twenty-four million, six hundred thirty thousand, one hundred one".