12123121195 has 4 divisors (see below), whose sum is σ = 14547745440. Its totient is φ = 9698496952.

The previous prime is 12123121187. The next prime is 12123121201. The reversal of 12123121195 is 59112132121.

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

It is a cyclic number.

It is not a de Polignac number, because 12123121195 - 2³ = 12123121187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212312115 + ... + 1212312124.

It is an arithmetic number, because the mean of its divisors is an integer number (3636936360).

Almost surely, 2^12123121195 is an apocalyptic number.

12123121195 is a deficient number, since it is larger than the sum of its proper divisors (2424624245).

12123121195 is an equidigital number, since it uses as much as digits as its factorization.

12123121195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424624244.

The product of its digits is 1080, while the sum is 28.

The spelling of 12123121195 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-one thousand, one hundred ninety-five".