10525118521 has 2 divisors, whose sum is σ = 10525118522. Its totient is φ = 10525118520.

The previous prime is 10525118449. The next prime is 10525118581. The reversal of 10525118521 is 12581152501.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8623722496 + 1901396025 = 92864^2 + 43605^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10525118521 is a prime.

It is a super-2 number, since 2×10525118521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10525118581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5262559260 + 5262559261.

It is an arithmetic number, because the mean of its divisors is an integer number (5262559261).

Almost surely, 2^10525118521 is an apocalyptic number.

It is an amenable number.

10525118521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10525118521 is an equidigital number, since it uses as much as digits as its factorization.

10525118521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4000, while the sum is 31.

The spelling of 10525118521 in words is "ten billion, five hundred twenty-five million, one hundred eighteen thousand, five hundred twenty-one".