11212129517 has 2 divisors, whose sum is σ = 11212129518. Its totient is φ = 11212129516.

The previous prime is 11212129469. The next prime is 11212129529. The reversal of 11212129517 is 71592121211.

11212129517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6911261956 + 4300867561 = 83134^2 + 65581^2 .

It is a cyclic number.

It is not a de Polignac number, because 11212129517 - 2⁸ = 11212129261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11212129547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5606064758 + 5606064759.

It is an arithmetic number, because the mean of its divisors is an integer number (5606064759).

Almost surely, 2^11212129517 is an apocalyptic number.

It is an amenable number.

11212129517 is a deficient number, since it is larger than the sum of its proper divisors (1).

11212129517 is an equidigital number, since it uses as much as digits as its factorization.

11212129517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 32.

The spelling of 11212129517 in words is "eleven billion, two hundred twelve million, one hundred twenty-nine thousand, five hundred seventeen".