111102212121611 has 2 divisors, whose sum is σ = 111102212121612. Its totient is φ = 111102212121610.

The previous prime is 111102212121583. The next prime is 111102212121623. The reversal of 111102212121611 is 116121212201111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111102212121611 is a prime.

It is not a weakly prime, because it can be changed into another prime (111102212120611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55551106060805 + 55551106060806.

It is an arithmetic number, because the mean of its divisors is an integer number (55551106060806).

Almost surely, 2^{111102212121611} is an apocalyptic number.

111102212121611 is a deficient number, since it is larger than the sum of its proper divisors (1).

111102212121611 is an equidigital number, since it uses as much as digits as its factorization.

111102212121611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 23.

Adding to 111102212121611 its reverse (116121212201111), we get a palindrome (227223424322722).

The spelling of 111102212121611 in words is "one hundred eleven trillion, one hundred two billion, two hundred twelve million, one hundred twenty-one thousand, six hundred eleven".