12100212131123 has 4 divisors (see below), whose sum is σ = 12180345986448. Its totient is φ = 12020078275800.

The previous prime is 12100212131113. The next prime is 12100212131149. The reversal of 12100212131123 is 32113121200121.

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

It is a cyclic number.

It is not a de Polignac number, because 12100212131123 - 2¹² = 12100212127027 is a prime.

It is a super-2 number, since 2×12100212131123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12100212131095 and 12100212131104.

It is not an unprimeable number, because it can be changed into a prime (12100212131113) 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, 40066927436 + ... + 40066927737.

It is an arithmetic number, because the mean of its divisors is an integer number (3045086496612).

Almost surely, 2^{12100212131123} is an apocalyptic number.

12100212131123 is a deficient number, since it is larger than the sum of its proper divisors (80133855325).

12100212131123 is an equidigital number, since it uses as much as digits as its factorization.

12100212131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80133855324.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 12100212131123 its reverse (32113121200121), we get a palindrome (44213333331244).

The spelling of 12100212131123 in words is "twelve trillion, one hundred billion, two hundred twelve million, one hundred thirty-one thousand, one hundred twenty-three".