123020132209 has 8 divisors (see below), whose sum is σ = 132513411240. Its totient is φ = 113531166336.

The previous prime is 123020132173. The next prime is 123020132237. The reversal of 123020132209 is 902231020321.

It can be written as a sum of positive squares in 4 ways, for example, as 7539101584 + 115481030625 = 86828^2 + 339825^2 .

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 123020132209 - 2¹⁵ = 123020099441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123020135209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1018924 + ... + 1133245.

It is an arithmetic number, because the mean of its divisors is an integer number (16564176405).

Almost surely, 2^123020132209 is an apocalyptic number.

It is an amenable number.

123020132209 is a deficient number, since it is larger than the sum of its proper divisors (9493279031).

123020132209 is a wasteful number, since it uses less digits than its factorization.

123020132209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156579.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 123020132209 in words is "one hundred twenty-three billion, twenty million, one hundred thirty-two thousand, two hundred nine".