125012424109 has 2 divisors, whose sum is σ = 125012424110. Its totient is φ = 125012424108.

The previous prime is 125012424083. The next prime is 125012424113. The reversal of 125012424109 is 901424210521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96789432100 + 28222992009 = 311110^2 + 167997^2 .

It is a cyclic number.

It is not a de Polignac number, because 125012424109 - 2⁵ = 125012424077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125012424139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62506212054 + 62506212055.

It is an arithmetic number, because the mean of its divisors is an integer number (62506212055).

Almost surely, 2^125012424109 is an apocalyptic number.

It is an amenable number.

125012424109 is a deficient number, since it is larger than the sum of its proper divisors (1).

125012424109 is an equidigital number, since it uses as much as digits as its factorization.

125012424109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 31.

The spelling of 125012424109 in words is "one hundred twenty-five billion, twelve million, four hundred twenty-four thousand, one hundred nine".