121101220117 has 2 divisors, whose sum is σ = 121101220118. Its totient is φ = 121101220116.

The previous prime is 121101220109. The next prime is 121101220129. The reversal of 121101220117 is 711022101121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121058068356 + 43151761 = 347934^2 + 6569^2 .

It is a cyclic number.

It is not a de Polignac number, because 121101220117 - 2³ = 121101220109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121101220094 and 121101220103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121101220157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60550610058 + 60550610059.

It is an arithmetic number, because the mean of its divisors is an integer number (60550610059).

Almost surely, 2^121101220117 is an apocalyptic number.

It is an amenable number.

121101220117 is a deficient number, since it is larger than the sum of its proper divisors (1).

121101220117 is an equidigital number, since it uses as much as digits as its factorization.

121101220117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 19.

Adding to 121101220117 its reverse (711022101121), we get a palindrome (832123321238).

The spelling of 121101220117 in words is "one hundred twenty-one billion, one hundred one million, two hundred twenty thousand, one hundred seventeen".