125303666303521 has 4 divisors (see below), whose sum is σ = 125425202353344. Its totient is φ = 125182130253700.

The previous prime is 125303666303507. The next prime is 125303666303579.

125303666303521 is nontrivially palindromic in base 10.

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 125303666303521 - 2¹³ = 125303666295329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125303666303821) 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, 60768023365 + ... + 60768025426.

It is an arithmetic number, because the mean of its divisors is an integer number (31356300588336).

Almost surely, 2^{125303666303521} is an apocalyptic number.

It is an amenable number.

125303666303521 is a deficient number, since it is larger than the sum of its proper divisors (121536049823).

125303666303521 is a wasteful number, since it uses less digits than its factorization.

125303666303521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121536049822.

The product of its (nonzero) digits is 1749600, while the sum is 46.

The spelling of 125303666303521 in words is "one hundred twenty-five trillion, three hundred three billion, six hundred sixty-six million, three hundred three thousand, five hundred twenty-one".