125048180921 has 2 divisors, whose sum is σ = 125048180922. Its totient is φ = 125048180920.

The previous prime is 125048180911. The next prime is 125048180941. The reversal of 125048180921 is 129081840521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86174538025 + 38873642896 = 293555^2 + 197164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125048180921 is a prime.

It is a super-2 number, since 2×125048180921² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125048180911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62524090460 + 62524090461.

It is an arithmetic number, because the mean of its divisors is an integer number (62524090461).

Almost surely, 2^125048180921 is an apocalyptic number.

It is an amenable number.

125048180921 is a deficient number, since it is larger than the sum of its proper divisors (1).

125048180921 is an equidigital number, since it uses as much as digits as its factorization.

125048180921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 41.

The spelling of 125048180921 in words is "one hundred twenty-five billion, forty-eight million, one hundred eighty thousand, nine hundred twenty-one".