121100489 has 2 divisors, whose sum is σ = 121100490. Its totient is φ = 121100488.

The previous prime is 121100479. The next prime is 121100501. The reversal of 121100489 is 984001121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121000000 + 100489 = 11000^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 121100489 - 2⁸ = 121100233 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (121100449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550244 + 60550245.

It is an arithmetic number, because the mean of its divisors is an integer number (60550245).

Almost surely, 2^121100489 is an apocalyptic number.

It is an amenable number.

121100489 is a deficient number, since it is larger than the sum of its proper divisors (1).

121100489 is an equidigital number, since it uses as much as digits as its factorization.

121100489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 121100489 is about 11004.5667338610. The cubic root of 121100489 is about 494.7456285819.

It can be divided in two parts, 121 and 100489, that multiplied together give a square (12159169 = 3487²).

The spelling of 121100489 in words is "one hundred twenty-one million, one hundred thousand, four hundred eighty-nine".