102081121 has 4 divisors (see below), whose sum is σ = 103754644. Its totient is φ = 100407600.

The previous prime is 102081079. The next prime is 102081139. The reversal of 102081121 is 121180201.

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 1299600 + 100781521 = 1140^2 + 10039^2 .

It is a cyclic number.

It is not a de Polignac number, because 102081121 - 2¹¹ = 102079073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102081095 and 102081104.

It is not an unprimeable number, because it can be changed into a prime (102081181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 836670 + ... + 836791.

It is an arithmetic number, because the mean of its divisors is an integer number (25938661).

Almost surely, 2^102081121 is an apocalyptic number.

It is an amenable number.

102081121 is a deficient number, since it is larger than the sum of its proper divisors (1673523).

102081121 is an equidigital number, since it uses as much as digits as its factorization.

102081121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673522.

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 102081121 is about 10103.5202281185. The cubic root of 102081121 is about 467.3567040589.

The spelling of 102081121 in words is "one hundred two million, eighty-one thousand, one hundred twenty-one".