123132331221209 has 4 divisors (see below), whose sum is σ = 123132498445620. Its totient is φ = 123132163996800.

The previous prime is 123132331221191. The next prime is 123132331221239. The reversal of 123132331221209 is 902122133231321.

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 83801208490000 + 39331122731209 = 9154300^2 + 6271453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123132331221209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123132331221239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82502804 + ... + 83982005.

It is an arithmetic number, because the mean of its divisors is an integer number (30783124611405).

Almost surely, 2^{123132331221209} is an apocalyptic number.

It is an amenable number.

123132331221209 is a deficient number, since it is larger than the sum of its proper divisors (167224411).

123132331221209 is an equidigital number, since it uses as much as digits as its factorization.

123132331221209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167224410.

The product of its (nonzero) digits is 23328, while the sum is 35.

The spelling of 123132331221209 in words is "one hundred twenty-three trillion, one hundred thirty-two billion, three hundred thirty-one million, two hundred twenty-one thousand, two hundred nine".