121258121 has 2 divisors, whose sum is σ = 121258122. Its totient is φ = 121258120.

The previous prime is 121258097. The next prime is 121258129. The reversal of 121258121 is 121852121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78499600 + 42758521 = 8860^2 + 6539^2 .

It is an emirp because it is prime and its reverse (121852121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121258121 - 2¹⁸ = 120995977 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121258129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60629060 + 60629061.

It is an arithmetic number, because the mean of its divisors is an integer number (60629061).

Almost surely, 2^121258121 is an apocalyptic number.

It is an amenable number.

121258121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121258121 is an equidigital number, since it uses as much as digits as its factorization.

121258121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320, while the sum is 23.

The square root of 121258121 is about 11011.7265222126. The cubic root of 121258121 is about 494.9601995003.

The spelling of 121258121 in words is "one hundred twenty-one million, two hundred fifty-eight thousand, one hundred twenty-one".