121111321117 has 2 divisors, whose sum is σ = 121111321118. Its totient is φ = 121111321116.

The previous prime is 121111320991. The next prime is 121111321147. The reversal of 121111321117 is 711123111121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91191316441 + 29920004676 = 301979^2 + 172974^2 .

It is an emirp because it is prime and its reverse (711123111121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121111321117 - 2³¹ = 118963837469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121111321147) 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, 60555660558 + 60555660559.

It is an arithmetic number, because the mean of its divisors is an integer number (60555660559).

Almost surely, 2^121111321117 is an apocalyptic number.

It is an amenable number.

121111321117 is a deficient number, since it is larger than the sum of its proper divisors (1).

121111321117 is an equidigital number, since it uses as much as digits as its factorization.

121111321117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 22.

Adding to 121111321117 its reverse (711123111121), we get a palindrome (832234432238).

The spelling of 121111321117 in words is "one hundred twenty-one billion, one hundred eleven million, three hundred twenty-one thousand, one hundred seventeen".