125022548689981 has 2 divisors, whose sum is σ = 125022548689982. Its totient is φ = 125022548689980.

The previous prime is 125022548689979. The next prime is 125022548689993. The reversal of 125022548689981 is 189986845220521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68236768908025 + 56785779781956 = 8260555^2 + 7535634^2 .

It is a cyclic number.

It is not a de Polignac number, because 125022548689981 - 2¹ = 125022548689979 is a prime.

It is a super-2 number, since 2×125022548689981² (a number of 29 digits) contains 22 as substring.

Together with 125022548689979, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 125022548689981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125022548681981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62511274344990 + 62511274344991.

It is an arithmetic number, because the mean of its divisors is an integer number (62511274344991).

Almost surely, 2^{125022548689981} is an apocalyptic number.

It is an amenable number.

125022548689981 is a deficient number, since it is larger than the sum of its proper divisors (1).

125022548689981 is an equidigital number, since it uses as much as digits as its factorization.

125022548689981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 199065600, while the sum is 70.

The spelling of 125022548689981 in words is "one hundred twenty-five trillion, twenty-two billion, five hundred forty-eight million, six hundred eighty-nine thousand, nine hundred eighty-one".