12011212123023 has 4 divisors (see below), whose sum is σ = 16014949497368. Its totient is φ = 8007474748680.

The previous prime is 12011212123021. The next prime is 12011212123037. The reversal of 12011212123023 is 32032121211021.

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

It is not a de Polignac number, because 12011212123023 - 2¹ = 12011212123021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011212123021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2001868687168 + ... + 2001868687173.

It is an arithmetic number, because the mean of its divisors is an integer number (4003737374342).

Almost surely, 2^{12011212123023} is an apocalyptic number.

12011212123023 is a deficient number, since it is larger than the sum of its proper divisors (4003737374345).

12011212123023 is an equidigital number, since it uses as much as digits as its factorization.

12011212123023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003737374344.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 12011212123023 its reverse (32032121211021), we get a palindrome (44043333334044).

The spelling of 12011212123023 in words is "twelve trillion, eleven billion, two hundred twelve million, one hundred twenty-three thousand, twenty-three".