100434725521 has 4 divisors (see below), whose sum is σ = 108160473652. Its totient is φ = 92708977392.

The previous prime is 100434725519. The next prime is 100434725537. The reversal of 100434725521 is 125527434001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125527434001 = 13901 ⋅9030101.

It can be written as a sum of positive squares in 2 ways, for example, as 58196255121 + 42238470400 = 241239^2 + 205520^2 .

It is a cyclic number.

It is not a de Polignac number, because 100434725521 - 2¹ = 100434725519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100434725581) 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, 3862874046 + ... + 3862874071.

It is an arithmetic number, because the mean of its divisors is an integer number (27040118413).

Almost surely, 2^100434725521 is an apocalyptic number.

It is an amenable number.

100434725521 is a deficient number, since it is larger than the sum of its proper divisors (7725748131).

100434725521 is an equidigital number, since it uses as much as digits as its factorization.

100434725521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7725748130.

The product of its (nonzero) digits is 33600, while the sum is 34.

The spelling of 100434725521 in words is "one hundred billion, four hundred thirty-four million, seven hundred twenty-five thousand, five hundred twenty-one".