12111002131 has 2 divisors, whose sum is σ = 12111002132. Its totient is φ = 12111002130.

The previous prime is 12111002077. The next prime is 12111002149. The reversal of 12111002131 is 13120011121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111002131 - 2⁹ = 12111001619 is a prime.

It is a super-2 number, since 2×12111002131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12111002231) 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 as a sum of consecutive naturals, namely, 6055501065 + 6055501066.

It is an arithmetic number, because the mean of its divisors is an integer number (6055501066).

Almost surely, 2^12111002131 is an apocalyptic number.

12111002131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111002131 is an equidigital number, since it uses as much as digits as its factorization.

12111002131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 12111002131 its reverse (13120011121), we get a palindrome (25231013252).

The spelling of 12111002131 in words is "twelve billion, one hundred eleven million, two thousand, one hundred thirty-one".