121102181 has 8 divisors (see below), whose sum is σ = 129091200. Its totient is φ = 113274720.

The previous prime is 121102171. The next prime is 121102243. The reversal of 121102181 is 181201121.

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 121102181 - 2¹⁰ = 121101157 is a prime.

It is a super-4 number, since 4×121102181⁴ (a number of 33 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121102171) 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, 38840 + ... + 41841.

It is an arithmetic number, because the mean of its divisors is an integer number (16136400).

Almost surely, 2^121102181 is an apocalyptic number.

It is an amenable number.

121102181 is a deficient number, since it is larger than the sum of its proper divisors (7989019).

121102181 is an equidigital number, since it uses as much as digits as its factorization.

121102181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80779.

The product of its (nonzero) digits is 32, while the sum is 17.

The square root of 121102181 is about 11004.6436107672. The cubic root of 121102181 is about 494.7479327446.

The spelling of 121102181 in words is "one hundred twenty-one million, one hundred two thousand, one hundred eighty-one".