121234989 has 8 divisors (see below), whose sum is σ = 161855200. Its totient is φ = 80719056.

The previous prime is 121234987. The next prime is 121235003. The reversal of 121234989 is 989432121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121234989 - 2¹ = 121234987 is a prime.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121234987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23314 + ... + 28035.

It is an arithmetic number, because the mean of its divisors is an integer number (20231900).

Almost surely, 2^121234989 is an apocalyptic number.

It is an amenable number.

121234989 is a deficient number, since it is larger than the sum of its proper divisors (40620211).

121234989 is an equidigital number, since it uses as much as digits as its factorization.

121234989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52139.

The product of its digits is 31104, while the sum is 39.

The square root of 121234989 is about 11010.6761372769. The cubic root of 121234989 is about 494.9287235399.

The spelling of 121234989 in words is "one hundred twenty-one million, two hundred thirty-four thousand, nine hundred eighty-nine".