12123212011133 has 4 divisors (see below), whose sum is σ = 12195806095200. Its totient is φ = 12050617927068.

The previous prime is 12123212011129. The next prime is 12123212011139. The reversal of 12123212011133 is 33111021232121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12123212011133 - 2² = 12123212011129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12123212011099 and 12123212011108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123212011139) 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, 36297041783 + ... + 36297042116.

It is an arithmetic number, because the mean of its divisors is an integer number (3048951523800).

Almost surely, 2^{12123212011133} is an apocalyptic number.

It is an amenable number.

12123212011133 is a deficient number, since it is larger than the sum of its proper divisors (72594084067).

12123212011133 is an equidigital number, since it uses as much as digits as its factorization.

12123212011133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72594084066.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 12123212011133 its reverse (33111021232121), we get a palindrome (45234233243254).

The spelling of 12123212011133 in words is "twelve trillion, one hundred twenty-three billion, two hundred twelve million, eleven thousand, one hundred thirty-three".