122009 has 4 divisors (see below), whose sum is σ = 129204. Its totient is φ = 114816.

The previous prime is 121997. The next prime is 122011. The reversal of 122009 is 900221.

122009 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900221 = 7 ⋅128603.

It can be written as a sum of positive squares in 2 ways, for example, as 105625 + 16384 = 325^2 + 128^2 .

It is a cyclic number.

It is not a de Polignac number, because 122009 - 2⁴ = 121993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121984 and 122002.

It is not an unprimeable number, because it can be changed into a prime (122029) 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, 3572 + ... + 3605.

It is an arithmetic number, because the mean of its divisors is an integer number (32301).

2¹²²⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

122009 is a deficient number, since it is larger than the sum of its proper divisors (7195).

122009 is an equidigital number, since it uses as much as digits as its factorization.

122009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7194.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 122009 is about 349.2978671564. The cubic root of 122009 is about 49.5979762008.

The spelling of 122009 in words is "one hundred twenty-two thousand, nine".