10125045521 has 8 divisors (see below), whose sum is σ = 10747647720. Its totient is φ = 9505444608.

The previous prime is 10125045509. The next prime is 10125045551. The reversal of 10125045521 is 12554052101.

It can be written as a sum of positive squares in 4 ways, for example, as 5313681025 + 4811364496 = 72895^2 + 69364^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10125045521 - 2¹⁸ = 10124783377 is a prime.

It is a super-2 number, since 2×10125045521² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10125045551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 743366 + ... + 756863.

It is an arithmetic number, because the mean of its divisors is an integer number (1343455965).

Almost surely, 2^10125045521 is an apocalyptic number.

It is an amenable number.

10125045521 is a deficient number, since it is larger than the sum of its proper divisors (622602199).

10125045521 is a wasteful number, since it uses less digits than its factorization.

10125045521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1500643.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 10125045521 its reverse (12554052101), we get a palindrome (22679097622).

The spelling of 10125045521 in words is "ten billion, one hundred twenty-five million, forty-five thousand, five hundred twenty-one".