121110989 has 8 divisors (see below), whose sum is σ = 127652760. Its totient is φ = 114726976.

The previous prime is 121110973. The next prime is 121110991. The reversal of 121110989 is 989011121.

It can be written as a sum of positive squares in 4 ways, for example, as 49420900 + 71690089 = 7030^2 + 8467^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 121110989 - 2⁴ = 121110973 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 (121110929) 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, 37862 + ... + 40935.

It is an arithmetic number, because the mean of its divisors is an integer number (15956595).

Almost surely, 2^121110989 is an apocalyptic number.

It is an amenable number.

121110989 is a deficient number, since it is larger than the sum of its proper divisors (6541771).

121110989 is an equidigital number, since it uses as much as digits as its factorization.

121110989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78879.

The product of its (nonzero) digits is 1296, while the sum is 32.

The square root of 121110989 is about 11005.0437981864. The cubic root of 121110989 is about 494.7599271175.

The spelling of 121110989 in words is "one hundred twenty-one million, one hundred ten thousand, nine hundred eighty-nine".