121158397 has 2 divisors, whose sum is σ = 121158398. Its totient is φ = 121158396.

The previous prime is 121158379. The next prime is 121158413. The reversal of 121158397 is 793851121.

Together with previous prime (121158379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117202276 + 3956121 = 10826^2 + 1989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121158397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121158097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60579198 + 60579199.

It is an arithmetic number, because the mean of its divisors is an integer number (60579199).

Almost surely, 2^121158397 is an apocalyptic number.

It is an amenable number.

121158397 is a deficient number, since it is larger than the sum of its proper divisors (1).

121158397 is an equidigital number, since it uses as much as digits as its factorization.

121158397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 37.

The square root of 121158397 is about 11007.1975089030. The cubic root of 121158397 is about 494.8244753994.

The spelling of 121158397 in words is "one hundred twenty-one million, one hundred fifty-eight thousand, three hundred ninety-seven".