125740233121 has 4 divisors (see below), whose sum is σ = 125749998612. Its totient is φ = 125730467632.

The previous prime is 125740233109. The next prime is 125740233139. The reversal of 125740233121 is 121332047521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 121332047521 = 571 ⋅212490451.

It can be written as a sum of positive squares in 2 ways, for example, as 27203884096 + 98536349025 = 164936^2 + 313905^2 .

It is a cyclic number.

It is not a de Polignac number, because 125740233121 - 2⁵ = 125740233089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125740233221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4863406 + ... + 4889191.

It is an arithmetic number, because the mean of its divisors is an integer number (31437499653).

Almost surely, 2^125740233121 is an apocalyptic number.

It is an amenable number.

125740233121 is a deficient number, since it is larger than the sum of its proper divisors (9765491).

125740233121 is an equidigital number, since it uses as much as digits as its factorization.

125740233121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9765490.

The product of its (nonzero) digits is 10080, while the sum is 31.

The spelling of 125740233121 in words is "one hundred twenty-five billion, seven hundred forty million, two hundred thirty-three thousand, one hundred twenty-one".