194121133 has 2 divisors, whose sum is σ = 194121134. Its totient is φ = 194121132.

The previous prime is 194121121. The next prime is 194121143. The reversal of 194121133 is 331121491.

194121133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193682889 + 438244 = 13917^2 + 662^2 .

It is a cyclic number.

It is not a de Polignac number, because 194121133 - 2¹⁷ = 193990061 is a prime.

It is equal to p_10771414 and since 194121133 and 10771414 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 194121098 and 194121107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194121143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97060566 + 97060567.

It is an arithmetic number, because the mean of its divisors is an integer number (97060567).

Almost surely, 2^194121133 is an apocalyptic number.

It is an amenable number.

194121133 is a deficient number, since it is larger than the sum of its proper divisors (1).

194121133 is an equidigital number, since it uses as much as digits as its factorization.

194121133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 194121133 is about 13932.7360198921. The cubic root of 194121133 is about 579.0164991028.

It can be divided in two parts, 1941 and 21133, that multiplied together give a triangular number (41019153 = T₉₀₅₇).

The spelling of 194121133 in words is "one hundred ninety-four million, one hundred twenty-one thousand, one hundred thirty-three".