11312121017 has 2 divisors, whose sum is σ = 11312121018. Its totient is φ = 11312121016.

The previous prime is 11312120993. The next prime is 11312121047. The reversal of 11312121017 is 71012121311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10858473616 + 453647401 = 104204^2 + 21299^2 .

It is a cyclic number.

It is not a de Polignac number, because 11312121017 - 2²² = 11307926713 is a prime.

It is a super-2 number, since 2×11312121017² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11312121017.

It is not a weakly prime, because it can be changed into another prime (11312121047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5656060508 + 5656060509.

It is an arithmetic number, because the mean of its divisors is an integer number (5656060509).

Almost surely, 2^11312121017 is an apocalyptic number.

It is an amenable number.

11312121017 is a deficient number, since it is larger than the sum of its proper divisors (1).

11312121017 is an equidigital number, since it uses as much as digits as its factorization.

11312121017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 20.

Adding to 11312121017 its reverse (71012121311), we get a palindrome (82324242328).

The spelling of 11312121017 in words is "eleven billion, three hundred twelve million, one hundred twenty-one thousand, seventeen".