131122111 has 2 divisors, whose sum is σ = 131122112. Its totient is φ = 131122110.

The previous prime is 131122109. The next prime is 131122129. The reversal of 131122111 is 111221131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131122111 - 2¹ = 131122109 is a prime.

Together with 131122109, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 131122091 and 131122100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131122181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65561055 + 65561056.

It is an arithmetic number, because the mean of its divisors is an integer number (65561056).

Almost surely, 2^131122111 is an apocalyptic number.

131122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

131122111 is an equidigital number, since it uses as much as digits as its factorization.

131122111 is an odious number, because the sum of its binary digits is odd.

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

The square root of 131122111 is about 11450.8563435230. The cubic root of 131122111 is about 508.0330632892.

Adding to 131122111 its reverse (111221131), we get a palindrome (242343242).

The spelling of 131122111 in words is "one hundred thirty-one million, one hundred twenty-two thousand, one hundred eleven".