102171265561 has 8 divisors (see below), whose sum is σ = 103476182400. Its totient is φ = 100866639120.

The previous prime is 102171265529. The next prime is 102171265571. The reversal of 102171265561 is 165562171201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102171265561 - 2⁵ = 102171265529 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 102171265561.

It is not an unprimeable number, because it can be changed into a prime (102171265501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 685791 + ... + 821371.

It is an arithmetic number, because the mean of its divisors is an integer number (12934522800).

Almost surely, 2^102171265561 is an apocalyptic number.

It is an amenable number.

102171265561 is a deficient number, since it is larger than the sum of its proper divisors (1304916839).

102171265561 is an equidigital number, since it uses as much as digits as its factorization.

102171265561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145199.

The product of its (nonzero) digits is 25200, while the sum is 37.

The spelling of 102171265561 in words is "one hundred two billion, one hundred seventy-one million, two hundred sixty-five thousand, five hundred sixty-one".