12001222123 has 4 divisors (see below), whose sum is σ = 13092242328. Its totient is φ = 10910201920.

The previous prime is 12001222117. The next prime is 12001222147. The reversal of 12001222123 is 32122210021.

It is a happy number.

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 12001222123 - 2⁵ = 12001222091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12001222097 and 12001222106.

It is not an unprimeable number, because it can be changed into a prime (12001222193) 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 3 ways as a sum of consecutive naturals, for example, 545510086 + ... + 545510107.

It is an arithmetic number, because the mean of its divisors is an integer number (3273060582).

Almost surely, 2^12001222123 is an apocalyptic number.

12001222123 is a deficient number, since it is larger than the sum of its proper divisors (1091020205).

12001222123 is a wasteful number, since it uses less digits than its factorization.

12001222123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091020204.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 12001222123 its reverse (32122210021), we get a palindrome (44123432144).

The spelling of 12001222123 in words is "twelve billion, one million, two hundred twenty-two thousand, one hundred twenty-three".