188121 has 8 divisors (see below), whose sum is σ = 254560. Its totient is φ = 123552.

The previous prime is 188107. The next prime is 188137. The reversal of 188121 is 121881.

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

It is a de Polignac number, because none of the positive numbers 2^k-188121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (188171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211 + ... + 648.

It is an arithmetic number, because the mean of its divisors is an integer number (31820).

2¹⁸⁸¹²¹ is an apocalyptic number.

It is an amenable number.

188121 is a deficient number, since it is larger than the sum of its proper divisors (66439).

188121 is an equidigital number, since it uses as much as digits as its factorization.

188121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its digits is 128, while the sum is 21.

The square root of 188121 is about 433.7291781746. The cubic root of 188121 is about 57.2988307221.

The spelling of 188121 in words is "one hundred eighty-eight thousand, one hundred twenty-one".