12123132194 has 4 divisors (see below), whose sum is σ = 18184698294. Its totient is φ = 6061566096.

The previous prime is 12123132181. The next prime is 12123132223. The reversal of 12123132194 is 49123132121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10802899969 + 1320232225 = 103937^2 + 36335^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3030783047 + ... + 3030783050.

Almost surely, 2^12123132194 is an apocalyptic number.

12123132194 is a deficient number, since it is larger than the sum of its proper divisors (6061566100).

12123132194 is an equidigital number, since it uses as much as digits as its factorization.

12123132194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061566099.

The product of its digits is 2592, while the sum is 29.

The spelling of 12123132194 in words is "twelve billion, one hundred twenty-three million, one hundred thirty-two thousand, one hundred ninety-four".