188250121 has 2 divisors, whose sum is σ = 188250122. Its totient is φ = 188250120.

The previous prime is 188250109. The next prime is 188250143. The reversal of 188250121 is 121052881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127238400 + 61011721 = 11280^2 + 7811^2 .

It is a cyclic number.

It is not a de Polignac number, because 188250121 - 2⁹ = 188249609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188250121.

It is not a weakly prime, because it can be changed into another prime (188250151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94125060 + 94125061.

It is an arithmetic number, because the mean of its divisors is an integer number (94125061).

Almost surely, 2^188250121 is an apocalyptic number.

It is an amenable number.

188250121 is a deficient number, since it is larger than the sum of its proper divisors (1).

188250121 is an equidigital number, since it uses as much as digits as its factorization.

188250121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1280, while the sum is 28.

The square root of 188250121 is about 13720.4271434967. The cubic root of 188250121 is about 573.1193716295.

It can be divided in two parts, 1882 and 50121, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 188250121 in words is "one hundred eighty-eight million, two hundred fifty thousand, one hundred twenty-one".