123132113209 has 4 divisors (see below), whose sum is σ = 140722415104. Its totient is φ = 105541811316.

The previous prime is 123132113161. The next prime is 123132113249. The reversal of 123132113209 is 902311231321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902311231321 = 66923 ⋅13482827.

It is a cyclic number.

It is not a de Polignac number, because 123132113209 - 2¹⁵ = 123132080441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123132113249) 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, 8795150937 + ... + 8795150950.

It is an arithmetic number, because the mean of its divisors is an integer number (35180603776).

Almost surely, 2^123132113209 is an apocalyptic number.

It is an amenable number.

123132113209 is a deficient number, since it is larger than the sum of its proper divisors (17590301895).

123132113209 is an equidigital number, since it uses as much as digits as its factorization.

123132113209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17590301894.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 123132113209 in words is "one hundred twenty-three billion, one hundred thirty-two million, one hundred thirteen thousand, two hundred nine".