11121221342111 has 2 divisors, whose sum is σ = 11121221342112. Its totient is φ = 11121221342110.

The previous prime is 11121221342071. The next prime is 11121221342129. The reversal of 11121221342111 is 11124312212111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11121221342111 - 2⁶ = 11121221342047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11121221342141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560610671055 + 5560610671056.

It is an arithmetic number, because the mean of its divisors is an integer number (5560610671056).

Almost surely, 2^{11121221342111} is an apocalyptic number.

11121221342111 is a deficient number, since it is larger than the sum of its proper divisors (1).

11121221342111 is an equidigital number, since it uses as much as digits as its factorization.

11121221342111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 192, while the sum is 23.

Adding to 11121221342111 its reverse (11124312212111), we get a palindrome (22245533554222).

The spelling of 11121221342111 in words is "eleven trillion, one hundred twenty-one billion, two hundred twenty-one million, three hundred forty-two thousand, one hundred eleven".