121119989 has 4 divisors (see below), whose sum is σ = 121162860. Its totient is φ = 121077120.

The previous prime is 121119983. The next prime is 121120009. The reversal of 121119989 is 989911121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 116424100 + 4695889 = 10790^2 + 2167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121119989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121119983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16874 + ... + 22955.

It is an arithmetic number, because the mean of its divisors is an integer number (30290715).

Almost surely, 2^121119989 is an apocalyptic number.

It is an amenable number.

121119989 is a deficient number, since it is larger than the sum of its proper divisors (42871).

121119989 is an equidigital number, since it uses as much as digits as its factorization.

121119989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42870.

The product of its digits is 11664, while the sum is 41.

The square root of 121119989 is about 11005.4526940058. The cubic root of 121119989 is about 494.7721823474.

The spelling of 121119989 in words is "one hundred twenty-one million, one hundred nineteen thousand, nine hundred eighty-nine".