188070121 has 2 divisors, whose sum is σ = 188070122. Its totient is φ = 188070120.

The previous prime is 188070107. The next prime is 188070163. The reversal of 188070121 is 121070881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103632400 + 84437721 = 10180^2 + 9189^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188070121 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188070121.

It is not a weakly prime, because it can be changed into another prime (188070821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94035060 + 94035061.

It is an arithmetic number, because the mean of its divisors is an integer number (94035061).

Almost surely, 2^188070121 is an apocalyptic number.

It is an amenable number.

188070121 is a deficient number, since it is larger than the sum of its proper divisors (1).

188070121 is an equidigital number, since it uses as much as digits as its factorization.

188070121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 188070121 is about 13713.8660121791. The cubic root of 188070121 is about 572.9366459665.

It can be divided in two parts, 188070 and 121, that added together give a triangular number (188191 = T₆₁₃).

The spelling of 188070121 in words is "one hundred eighty-eight million, seventy thousand, one hundred twenty-one".