121340425189 has 2 divisors, whose sum is σ = 121340425190. Its totient is φ = 121340425188.

The previous prime is 121340425147. The next prime is 121340425231. The reversal of 121340425189 is 981524043121.

It is a balanced prime because it is at equal distance from previous prime (121340425147) and next prime (121340425231).

It can be written as a sum of positive squares in only one way, i.e., 101525076900 + 19815348289 = 318630^2 + 140767^2 .

It is an emirp because it is prime and its reverse (981524043121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121340425189 - 2¹⁹ = 121339900901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121340425489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60670212594 + 60670212595.

It is an arithmetic number, because the mean of its divisors is an integer number (60670212595).

Almost surely, 2^121340425189 is an apocalyptic number.

It is an amenable number.

121340425189 is a deficient number, since it is larger than the sum of its proper divisors (1).

121340425189 is an equidigital number, since it uses as much as digits as its factorization.

121340425189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 40.

The spelling of 121340425189 in words is "one hundred twenty-one billion, three hundred forty million, four hundred twenty-five thousand, one hundred eighty-nine".