104861921324521 has 3 divisors (see below), whose sum is σ = 104861931564733. Its totient is φ = 104861911084310.

The previous prime is 104861921324477. The next prime is 104861921324543. The reversal of 104861921324521 is 125423129168401.

It is a happy number.

The square root of 104861921324521 is 10240211.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 104861921324521 - 2¹⁵ = 104861921291753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104861921324021) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 5120106 + ... + 15360316.

Almost surely, 2^{104861921324521} is an apocalyptic number.

104861921324521 is the 10240211-st square number.

104861921324521 is the 5120106-th centered octagonal number.

It is an amenable number.

104861921324521 is a deficient number, since it is larger than the sum of its proper divisors (10240212).

104861921324521 is an frugal number, since it uses more digits than its factorization.

104861921324521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20480422 (or 10240211 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 104861921324521 in words is "one hundred four trillion, eight hundred sixty-one billion, nine hundred twenty-one million, three hundred twenty-four thousand, five hundred twenty-one".