12000213123 has 16 divisors (see below), whose sum is σ = 16227025920. Its totient is φ = 7887175904.

The previous prime is 12000213103. The next prime is 12000213157. The reversal of 12000213123 is 32131200021.

It is a cyclic number.

It is not a de Polignac number, because 12000213123 - 2⁸ = 12000212867 is a prime.

It is a super-2 number, since 2×12000213123² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12000213103) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68965 + ... + 169577.

It is an arithmetic number, because the mean of its divisors is an integer number (1014189120).

Almost surely, 2^12000213123 is an apocalyptic number.

12000213123 is a deficient number, since it is larger than the sum of its proper divisors (4226812797).

12000213123 is a wasteful number, since it uses less digits than its factorization.

12000213123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101178.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 12000213123 its reverse (32131200021), we get a palindrome (44131413144).

The spelling of 12000213123 in words is "twelve billion, two hundred thirteen thousand, one hundred twenty-three".