125001319999 has 4 divisors (see below), whose sum is σ = 125635844664. Its totient is φ = 124366795336.

The previous prime is 125001319997. The next prime is 125001320027. The reversal of 125001319999 is 999913100521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999913100521 = 52529 ⋅19035449.

It is a cyclic number.

It is not a de Polignac number, because 125001319999 - 2¹ = 125001319997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125001319997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317262037 + ... + 317262430.

It is an arithmetic number, because the mean of its divisors is an integer number (31408961166).

Almost surely, 2^125001319999 is an apocalyptic number.

125001319999 is a deficient number, since it is larger than the sum of its proper divisors (634524665).

125001319999 is an equidigital number, since it uses as much as digits as its factorization.

125001319999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634524664.

The product of its (nonzero) digits is 196830, while the sum is 49.

The spelling of 125001319999 in words is "one hundred twenty-five billion, one million, three hundred nineteen thousand, nine hundred ninety-nine".