331121222111 has 2 divisors, whose sum is σ = 331121222112. Its totient is φ = 331121222110.

The previous prime is 331121222071. The next prime is 331121222123. The reversal of 331121222111 is 111222121133.

It is a strong prime.

It is an emirp because it is prime and its reverse (111222121133) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331121222111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331121222161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165560611055 + 165560611056.

It is an arithmetic number, because the mean of its divisors is an integer number (165560611056).

Almost surely, 2^331121222111 is an apocalyptic number.

331121222111 is a deficient number, since it is larger than the sum of its proper divisors (1).

331121222111 is an equidigital number, since it uses as much as digits as its factorization.

331121222111 is an odious number, because the sum of its binary digits is odd.

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

Adding to 331121222111 its reverse (111222121133), we get a palindrome (442343343244).

The spelling of 331121222111 in words is "three hundred thirty-one billion, one hundred twenty-one million, two hundred twenty-two thousand, one hundred eleven".