121448189 has 2 divisors, whose sum is σ = 121448190. Its totient is φ = 121448188.

The previous prime is 121448167. The next prime is 121448233. The reversal of 121448189 is 981844121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99900025 + 21548164 = 9995^2 + 4642^2 .

It is a cyclic number.

It is not a de Polignac number, because 121448189 - 2⁸ = 121447933 is a prime.

It is a super-2 number, since 2×121448189² = 29499325222759442, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121448149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60724094 + 60724095.

It is an arithmetic number, because the mean of its divisors is an integer number (60724095).

Almost surely, 2^121448189 is an apocalyptic number.

It is an amenable number.

121448189 is a deficient number, since it is larger than the sum of its proper divisors (1).

121448189 is an equidigital number, since it uses as much as digits as its factorization.

121448189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 38.

The square root of 121448189 is about 11020.3533972373. The cubic root of 121448189 is about 495.2186756158.

The spelling of 121448189 in words is "one hundred twenty-one million, four hundred forty-eight thousand, one hundred eighty-nine".