101608028521 has 4 divisors (see below), whose sum is σ = 104354191492. Its totient is φ = 98861865552.

The previous prime is 101608028519. The next prime is 101608028591. The reversal of 101608028521 is 125820806101.

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 48309842025 + 53298186496 = 219795^2 + 230864^2 .

It is a cyclic number.

It is not a de Polignac number, because 101608028521 - 2¹ = 101608028519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101608028591) 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, 1373081430 + ... + 1373081503.

It is an arithmetic number, because the mean of its divisors is an integer number (26088547873).

Almost surely, 2^101608028521 is an apocalyptic number.

It is an amenable number.

101608028521 is a deficient number, since it is larger than the sum of its proper divisors (2746162971).

101608028521 is an equidigital number, since it uses as much as digits as its factorization.

101608028521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2746162970.

The product of its (nonzero) digits is 7680, while the sum is 34.

The spelling of 101608028521 in words is "one hundred one billion, six hundred eight million, twenty-eight thousand, five hundred twenty-one".