12021020112123 has 12 divisors (see below), whose sum is σ = 18942213510168. Its totient is φ = 7285466734560.

The previous prime is 12021020112109. The next prime is 12021020112151. The reversal of 12021020112123 is 32121102012021.

12021020112123 is a `hidden beast` number, since 120 + 210 + 201 + 12 + 123 = 666.

It is not a de Polignac number, because 12021020112123 - 2¹⁰ = 12021020111099 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12021020112096 and 12021020112105.

It is not an unprimeable number, because it can be changed into a prime (12021020112163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60712222690 + ... + 60712222887.

It is an arithmetic number, because the mean of its divisors is an integer number (1578517792514).

Almost surely, 2^{12021020112123} is an apocalyptic number.

12021020112123 is a deficient number, since it is larger than the sum of its proper divisors (6921193398045).

12021020112123 is a wasteful number, since it uses less digits than its factorization.

12021020112123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121424445594 (or 121424445591 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 12021020112123 its reverse (32121102012021), we get a palindrome (44142122124144).

The spelling of 12021020112123 in words is "twelve trillion, twenty-one billion, twenty million, one hundred twelve thousand, one hundred twenty-three".