12021033123 has 16 divisors (see below), whose sum is σ = 19427932800. Its totient is φ = 7285474440.

The previous prime is 12021033121. The next prime is 12021033133. The reversal of 12021033123 is 32133012021.

12021033123 is a `hidden beast` number, since 120 + 210 + 331 + 2 + 3 = 666.

It is not a de Polignac number, because 12021033123 - 2¹ = 12021033121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021033096 and 12021033105.

It is not an unprimeable number, because it can be changed into a prime (12021033121) 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, 20237133 + ... + 20237726.

It is an arithmetic number, because the mean of its divisors is an integer number (1214245800).

Almost surely, 2^12021033123 is an apocalyptic number.

12021033123 is a deficient number, since it is larger than the sum of its proper divisors (7406899677).

12021033123 is a wasteful number, since it uses less digits than its factorization.

12021033123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40474879 (or 40474873 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 12021033123 its reverse (32133012021), we get a palindrome (44154045144).

The spelling of 12021033123 in words is "twelve billion, twenty-one million, thirty-three thousand, one hundred twenty-three".