121513501117 has 2 divisors, whose sum is σ = 121513501118. Its totient is φ = 121513501116.

The previous prime is 121513501103. The next prime is 121513501133. The reversal of 121513501117 is 711105315121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103419484921 + 18094016196 = 321589^2 + 134514^2 .

It is an emirp because it is prime and its reverse (711105315121) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121513501117 is a prime.

It is a super-2 number, since 2×121513501117² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121513501177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60756750558 + 60756750559.

It is an arithmetic number, because the mean of its divisors is an integer number (60756750559).

Almost surely, 2^121513501117 is an apocalyptic number.

It is an amenable number.

121513501117 is a deficient number, since it is larger than the sum of its proper divisors (1).

121513501117 is an equidigital number, since it uses as much as digits as its factorization.

121513501117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1050, while the sum is 28.

Adding to 121513501117 its reverse (711105315121), we get a palindrome (832618816238).

The spelling of 121513501117 in words is "one hundred twenty-one billion, five hundred thirteen million, five hundred one thousand, one hundred seventeen".