194841252121 has 2 divisors, whose sum is σ = 194841252122. Its totient is φ = 194841252120.

The previous prime is 194841252103. The next prime is 194841252127. The reversal of 194841252121 is 121252148491.

194841252121 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., 188172896521 + 6668355600 = 433789^2 + 81660^2 .

It is a cyclic number.

It is not a de Polignac number, because 194841252121 - 2⁷ = 194841251993 is a prime.

It is a super-2 number, since 2×194841252121² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (194841252127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97420626060 + 97420626061.

It is an arithmetic number, because the mean of its divisors is an integer number (97420626061).

Almost surely, 2^194841252121 is an apocalyptic number.

It is an amenable number.

194841252121 is a deficient number, since it is larger than the sum of its proper divisors (1).

194841252121 is an equidigital number, since it uses as much as digits as its factorization.

194841252121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 40.

The spelling of 194841252121 in words is "one hundred ninety-four billion, eight hundred forty-one million, two hundred fifty-two thousand, one hundred twenty-one".