121458121 has 2 divisors, whose sum is σ = 121458122. Its totient is φ = 121458120.

The previous prime is 121458083. The next prime is 121458131. The reversal of 121458121 is 121854121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77633721 + 43824400 = 8811^2 + 6620^2 .

It is a cyclic number.

It is not a de Polignac number, because 121458121 - 2¹¹ = 121456073 is a prime.

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

It is not a weakly prime, because it can be changed into another prime (121458131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60729060 + 60729061.

It is an arithmetic number, because the mean of its divisors is an integer number (60729061).

Almost surely, 2^121458121 is an apocalyptic number.

It is an amenable number.

121458121 is a deficient number, since it is larger than the sum of its proper divisors (1).

121458121 is an equidigital number, since it uses as much as digits as its factorization.

121458121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 25.

The square root of 121458121 is about 11020.8040087827. The cubic root of 121458121 is about 495.2321748642.

The spelling of 121458121 in words is "one hundred twenty-one million, four hundred fifty-eight thousand, one hundred twenty-one".