188160121 has 2 divisors, whose sum is σ = 188160122. Its totient is φ = 188160120.

The previous prime is 188160109. The next prime is 188160169. The reversal of 188160121 is 121061881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163558521 + 24601600 = 12789^2 + 4960^2 .

It is a cyclic number.

It is not a de Polignac number, because 188160121 - 2¹⁵ = 188127353 is a prime.

It is a super-2 number, since 2×188160121² = 70808462269469282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 188160121.

It is not a weakly prime, because it can be changed into another prime (188160101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94080060 + 94080061.

It is an arithmetic number, because the mean of its divisors is an integer number (94080061).

Almost surely, 2^188160121 is an apocalyptic number.

It is an amenable number.

188160121 is a deficient number, since it is larger than the sum of its proper divisors (1).

188160121 is an equidigital number, since it uses as much as digits as its factorization.

188160121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 28.

The square root of 188160121 is about 13717.1469701247. The cubic root of 188160121 is about 573.0280233648.

The spelling of 188160121 in words is "one hundred eighty-eight million, one hundred sixty thousand, one hundred twenty-one".