107521112521 has 4 divisors (see below), whose sum is σ = 107656020612. Its totient is φ = 107386204432.

The previous prime is 107521112513. The next prime is 107521112639. The reversal of 107521112521 is 125211125701.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19157604921 + 88363507600 = 138411^2 + 297260^2 .

It is a cyclic number.

It is not a de Polignac number, because 107521112521 - 2³ = 107521112513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 107521112521.

It is not an unprimeable number, because it can be changed into a prime (107527112521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67452850 + ... + 67454443.

It is an arithmetic number, because the mean of its divisors is an integer number (26914005153).

Almost surely, 2^107521112521 is an apocalyptic number.

It is an amenable number.

107521112521 is a deficient number, since it is larger than the sum of its proper divisors (134908091).

107521112521 is an equidigital number, since it uses as much as digits as its factorization.

107521112521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134908090.

The product of its (nonzero) digits is 1400, while the sum is 28.

The spelling of 107521112521 in words is "one hundred seven billion, five hundred twenty-one million, one hundred twelve thousand, five hundred twenty-one".