125201277217 has 2 divisors, whose sum is σ = 125201277218. Its totient is φ = 125201277216.

The previous prime is 125201277203. The next prime is 125201277259. The reversal of 125201277217 is 712772102521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96052885776 + 29148391441 = 309924^2 + 170729^2 .

It is an emirp because it is prime and its reverse (712772102521) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125201277217 is a prime.

It is not a weakly prime, because it can be changed into another prime (125201277277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62600638608 + 62600638609.

It is an arithmetic number, because the mean of its divisors is an integer number (62600638609).

Almost surely, 2^125201277217 is an apocalyptic number.

It is an amenable number.

125201277217 is a deficient number, since it is larger than the sum of its proper divisors (1).

125201277217 is an equidigital number, since it uses as much as digits as its factorization.

125201277217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27440, while the sum is 37.

Adding to 125201277217 its reverse (712772102521), we get a palindrome (837973379738).

The spelling of 125201277217 in words is "one hundred twenty-five billion, two hundred one million, two hundred seventy-seven thousand, two hundred seventeen".