121400089 has 2 divisors, whose sum is σ = 121400090. Its totient is φ = 121400088.

The previous prime is 121400087. The next prime is 121400099. The reversal of 121400089 is 980004121.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76737600 + 44662489 = 8760^2 + 6683^2 .

It is a cyclic number.

It is not a de Polignac number, because 121400089 - 2¹ = 121400087 is a prime.

Together with 121400087, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121400087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60700044 + 60700045.

It is an arithmetic number, because the mean of its divisors is an integer number (60700045).

Almost surely, 2^121400089 is an apocalyptic number.

It is an amenable number.

121400089 is a deficient number, since it is larger than the sum of its proper divisors (1).

121400089 is an equidigital number, since it uses as much as digits as its factorization.

121400089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 121400089 is about 11018.1708554551. The cubic root of 121400089 is about 495.1532892596.

The spelling of 121400089 in words is "one hundred twenty-one million, four hundred thousand, eighty-nine".