125155603541321 has 4 divisors (see below), whose sum is σ = 129192881074944. Its totient is φ = 121118326007700.

The previous prime is 125155603541257. The next prime is 125155603541341. The reversal of 125155603541321 is 123145306551521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 125155603541321 - 2⁶ = 125155603541257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125155603541341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2018638766765 + ... + 2018638766826.

It is an arithmetic number, because the mean of its divisors is an integer number (32298220268736).

Almost surely, 2^{125155603541321} is an apocalyptic number.

It is an amenable number.

125155603541321 is a deficient number, since it is larger than the sum of its proper divisors (4037277533623).

125155603541321 is an equidigital number, since it uses as much as digits as its factorization.

125155603541321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4037277533622.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 125155603541321 in words is "one hundred twenty-five trillion, one hundred fifty-five billion, six hundred three million, five hundred forty-one thousand, three hundred twenty-one".