121343222111 has 2 divisors, whose sum is σ = 121343222112. Its totient is φ = 121343222110.

The previous prime is 121343222093. The next prime is 121343222123. The reversal of 121343222111 is 111222343121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121343222111 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121343252111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60671611055 + 60671611056.

It is an arithmetic number, because the mean of its divisors is an integer number (60671611056).

Almost surely, 2^121343222111 is an apocalyptic number.

121343222111 is a deficient number, since it is larger than the sum of its proper divisors (1).

121343222111 is an equidigital number, since it uses as much as digits as its factorization.

121343222111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

Adding to 121343222111 its reverse (111222343121), we get a palindrome (232565565232).

The spelling of 121343222111 in words is "one hundred twenty-one billion, three hundred forty-three million, two hundred twenty-two thousand, one hundred eleven".