11431126561237 has 2 divisors, whose sum is σ = 11431126561238. Its totient is φ = 11431126561236.

The previous prime is 11431126561213. The next prime is 11431126561289. The reversal of 11431126561237 is 73216562113411.

It is a happy number.

11431126561237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11154056973361 + 277069587876 = 3339769^2 + 526374^2 .

It is a cyclic number.

It is not a de Polignac number, because 11431126561237 - 2⁴³ = 2635033539029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11431126561193 and 11431126561202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11431126561837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5715563280618 + 5715563280619.

It is an arithmetic number, because the mean of its divisors is an integer number (5715563280619).

Almost surely, 2^{11431126561237} is an apocalyptic number.

It is an amenable number.

11431126561237 is a deficient number, since it is larger than the sum of its proper divisors (1).

11431126561237 is an equidigital number, since it uses as much as digits as its factorization.

11431126561237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 43.

Adding to 11431126561237 its reverse (73216562113411), we get a palindrome (84647688674648).

The spelling of 11431126561237 in words is "eleven trillion, four hundred thirty-one billion, one hundred twenty-six million, five hundred sixty-one thousand, two hundred thirty-seven".