100521507161 has 4 divisors (see below), whose sum is σ = 106434537012. Its totient is φ = 94608477312.

The previous prime is 100521507101. The next prime is 100521507197. The reversal of 100521507161 is 161705125001.

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 92823199561 + 7698307600 = 304669^2 + 87740^2 .

It is a cyclic number.

It is not a de Polignac number, because 100521507161 - 2³⁰ = 99447765337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (100521507101) 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, 2956514900 + ... + 2956514933.

It is an arithmetic number, because the mean of its divisors is an integer number (26608634253).

Almost surely, 2^100521507161 is an apocalyptic number.

It is an amenable number.

100521507161 is a deficient number, since it is larger than the sum of its proper divisors (5913029851).

100521507161 is an equidigital number, since it uses as much as digits as its factorization.

100521507161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5913029850.

The product of its (nonzero) digits is 2100, while the sum is 29.

The spelling of 100521507161 in words is "one hundred billion, five hundred twenty-one million, five hundred seven thousand, one hundred sixty-one".