121221021110117 has 2 divisors, whose sum is σ = 121221021110118. Its totient is φ = 121221021110116.

The previous prime is 121221021110069. The next prime is 121221021110197. The reversal of 121221021110117 is 711011120122121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 105889677253441 + 15331343856676 = 10290271^2 + 3915526^2 .

It is a cyclic number.

It is not a de Polignac number, because 121221021110117 - 2⁶ = 121221021110053 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121221021110092 and 121221021110101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121221021110197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60610510555058 + 60610510555059.

It is an arithmetic number, because the mean of its divisors is an integer number (60610510555059).

Almost surely, 2^{121221021110117} is an apocalyptic number.

It is an amenable number.

121221021110117 is a deficient number, since it is larger than the sum of its proper divisors (1).

121221021110117 is an equidigital number, since it uses as much as digits as its factorization.

121221021110117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 23.

Adding to 121221021110117 its reverse (711011120122121), we get a palindrome (832232141232238).

The spelling of 121221021110117 in words is "one hundred twenty-one trillion, two hundred twenty-one billion, twenty-one million, one hundred ten thousand, one hundred seventeen".