121351121 has 2 divisors, whose sum is σ = 121351122. Its totient is φ = 121351120.

The previous prime is 121351099. The next prime is 121351123. The reversal of 121351121 is 121153121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117505600 + 3845521 = 10840^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 121351121 - 2⁶ = 121351057 is a prime.

Together with 121351123, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121351121.

It is not a weakly prime, because it can be changed into another prime (121351123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60675560 + 60675561.

It is an arithmetic number, because the mean of its divisors is an integer number (60675561).

Almost surely, 2^121351121 is an apocalyptic number.

It is an amenable number.

121351121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121351121 is an equidigital number, since it uses as much as digits as its factorization.

121351121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 17.

The square root of 121351121 is about 11015.9484839028. The cubic root of 121351121 is about 495.0867052143.

The spelling of 121351121 in words is "one hundred twenty-one million, three hundred fifty-one thousand, one hundred twenty-one".