12011212313131 has 4 divisors (see below), whose sum is σ = 12074098241664. Its totient is φ = 11948326384600.

The previous prime is 12011212313047. The next prime is 12011212313159. The reversal of 12011212313131 is 13131321211021.

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 12011212313131 - 2⁷ = 12011212313003 is a prime.

It is a super-2 number, since 2×12011212313131² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12011212314131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31442963980 + ... + 31442964361.

It is an arithmetic number, because the mean of its divisors is an integer number (3018524560416).

Almost surely, 2^{12011212313131} is an apocalyptic number.

12011212313131 is a deficient number, since it is larger than the sum of its proper divisors (62885928533).

12011212313131 is an equidigital number, since it uses as much as digits as its factorization.

12011212313131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62885928532.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 12011212313131 its reverse (13131321211021), we get a palindrome (25142533524152).

The spelling of 12011212313131 in words is "twelve trillion, eleven billion, two hundred twelve million, three hundred thirteen thousand, one hundred thirty-one".