12013221131 has 2 divisors, whose sum is σ = 12013221132. Its totient is φ = 12013221130.

The previous prime is 12013221079. The next prime is 12013221163. The reversal of 12013221131 is 13112231021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12013221131 - 2²⁶ = 11946112267 is a prime.

It is a super-2 number, since 2×12013221131² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (12013221331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6006610565 + 6006610566.

It is an arithmetic number, because the mean of its divisors is an integer number (6006610566).

Almost surely, 2^12013221131 is an apocalyptic number.

12013221131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12013221131 is an equidigital number, since it uses as much as digits as its factorization.

12013221131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12013221131 its reverse (13112231021), we get a palindrome (25125452152).

The spelling of 12013221131 in words is "twelve billion, thirteen million, two hundred twenty-one thousand, one hundred thirty-one".