125661338113 has 2 divisors, whose sum is σ = 125661338114. Its totient is φ = 125661338112.

The previous prime is 125661338041. The next prime is 125661338129. The reversal of 125661338113 is 311833166521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125509358529 + 151979584 = 354273^2 + 12328^2 .

It is an emirp because it is prime and its reverse (311833166521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125661338113 - 2⁹ = 125661337601 is a prime.

It is not a weakly prime, because it can be changed into another prime (125661338183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62830669056 + 62830669057.

It is an arithmetic number, because the mean of its divisors is an integer number (62830669057).

Almost surely, 2^125661338113 is an apocalyptic number.

It is an amenable number.

125661338113 is a deficient number, since it is larger than the sum of its proper divisors (1).

125661338113 is an equidigital number, since it uses as much as digits as its factorization.

125661338113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The spelling of 125661338113 in words is "one hundred twenty-five billion, six hundred sixty-one million, three hundred thirty-eight thousand, one hundred thirteen".