121000121117 has 2 divisors, whose sum is σ = 121000121118. Its totient is φ = 121000121116.

The previous prime is 121000121107. The next prime is 121000121173. The reversal of 121000121117 is 711121000121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115522492996 + 5477628121 = 339886^2 + 74011^2 .

It is a cyclic number.

It is not a de Polignac number, because 121000121117 - 2¹⁶ = 121000055581 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121000121095 and 121000121104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121000121107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60500060558 + 60500060559.

It is an arithmetic number, because the mean of its divisors is an integer number (60500060559).

Almost surely, 2^121000121117 is an apocalyptic number.

It is an amenable number.

121000121117 is a deficient number, since it is larger than the sum of its proper divisors (1).

121000121117 is an equidigital number, since it uses as much as digits as its factorization.

121000121117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 17.

Adding to 121000121117 its reverse (711121000121), we get a palindrome (832121121238).

The spelling of 121000121117 in words is "one hundred twenty-one billion, one hundred twenty-one thousand, one hundred seventeen".