125211044137 has 2 divisors, whose sum is σ = 125211044138. Its totient is φ = 125211044136.

The previous prime is 125211044117. The next prime is 125211044213. The reversal of 125211044137 is 731440112521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69959721001 + 55251323136 = 264499^2 + 235056^2 .

It is a cyclic number.

It is not a de Polignac number, because 125211044137 - 2³¹ = 123063560489 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125211044099 and 125211044108.

It is not a weakly prime, because it can be changed into another prime (125211044117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62605522068 + 62605522069.

It is an arithmetic number, because the mean of its divisors is an integer number (62605522069).

Almost surely, 2^125211044137 is an apocalyptic number.

It is an amenable number.

125211044137 is a deficient number, since it is larger than the sum of its proper divisors (1).

125211044137 is an equidigital number, since it uses as much as digits as its factorization.

125211044137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 31.

Adding to 125211044137 its reverse (731440112521), we get a palindrome (856651156658).

The spelling of 125211044137 in words is "one hundred twenty-five billion, two hundred eleven million, forty-four thousand, one hundred thirty-seven".