125012539999 has 2 divisors, whose sum is σ = 125012540000. Its totient is φ = 125012539998.

The previous prime is 125012539997. The next prime is 125012540027. The reversal of 125012539999 is 999935210521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125012539999 - 2¹ = 125012539997 is a prime.

Together with 125012539997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125012539997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62506269999 + 62506270000.

It is an arithmetic number, because the mean of its divisors is an integer number (62506270000).

Almost surely, 2^125012539999 is an apocalyptic number.

125012539999 is a deficient number, since it is larger than the sum of its proper divisors (1).

125012539999 is an equidigital number, since it uses as much as digits as its factorization.

125012539999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1968300, while the sum is 55.

The spelling of 125012539999 in words is "one hundred twenty-five billion, twelve million, five hundred thirty-nine thousand, nine hundred ninety-nine".