121312089 has 12 divisors (see below), whose sum is σ = 175324500. Its totient is φ = 80830464.

The previous prime is 121312069. The next prime is 121312109. The reversal of 121312089 is 980213121.

It is an interprime number because it is at equal distance from previous prime (121312069) and next prime (121312109).

It can be written as a sum of positive squares in 2 ways, for example, as 38192400 + 83119689 = 6180^2 + 9117^2 .

It is not a de Polignac number, because 121312089 - 2⁷ = 121311961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121312039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27937 + ... + 31985.

It is an arithmetic number, because the mean of its divisors is an integer number (14610375).

Almost surely, 2^121312089 is an apocalyptic number.

It is an amenable number.

121312089 is a deficient number, since it is larger than the sum of its proper divisors (54012411).

121312089 is a wasteful number, since it uses less digits than its factorization.

121312089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7384 (or 7381 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 121312089 is about 11014.1767281990. The cubic root of 121312089 is about 495.0336187757.

The spelling of 121312089 in words is "one hundred twenty-one million, three hundred twelve thousand, eighty-nine".