121340410189 has 2 divisors, whose sum is σ = 121340410190. Its totient is φ = 121340410188.

The previous prime is 121340410187. The next prime is 121340410283. The reversal of 121340410189 is 981014043121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94090654564 + 27249755625 = 306742^2 + 165075^2 .

It is a cyclic number.

It is not a de Polignac number, because 121340410189 - 2¹ = 121340410187 is a prime.

Together with 121340410187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121340410187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670205094 + 60670205095.

It is an arithmetic number, because the mean of its divisors is an integer number (60670205095).

Almost surely, 2^121340410189 is an apocalyptic number.

It is an amenable number.

121340410189 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340410189 is an equidigital number, since it uses as much as digits as its factorization.

121340410189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 121340410189 in words is "one hundred twenty-one billion, three hundred forty million, four hundred ten thousand, one hundred eighty-nine".