121201489 has 2 divisors, whose sum is σ = 121201490. Its totient is φ = 121201488.

The previous prime is 121201481. The next prime is 121201519. The reversal of 121201489 is 984102121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116273089 + 4928400 = 10783^2 + 2220^2 .

It is a cyclic number.

It is not a de Polignac number, because 121201489 - 2³ = 121201481 is a prime.

It is not a weakly prime, because it can be changed into another prime (121201481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60600744 + 60600745.

It is an arithmetic number, because the mean of its divisors is an integer number (60600745).

Almost surely, 2^121201489 is an apocalyptic number.

It is an amenable number.

121201489 is a deficient number, since it is larger than the sum of its proper divisors (1).

121201489 is an equidigital number, since it uses as much as digits as its factorization.

121201489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 121201489 is about 11009.1547813626. The cubic root of 121201489 is about 494.8831326320.

The spelling of 121201489 in words is "one hundred twenty-one million, two hundred one thousand, four hundred eighty-nine".