101212506517 has 2 divisors, whose sum is σ = 101212506518. Its totient is φ = 101212506516.

The previous prime is 101212506407. The next prime is 101212506523. The reversal of 101212506517 is 715605212101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79383626001 + 21828880516 = 281751^2 + 147746^2 .

It is a cyclic number.

It is not a de Polignac number, because 101212506517 - 2³⁵ = 66852768149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101212506547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50606253258 + 50606253259.

It is an arithmetic number, because the mean of its divisors is an integer number (50606253259).

Almost surely, 2^101212506517 is an apocalyptic number.

It is an amenable number.

101212506517 is a deficient number, since it is larger than the sum of its proper divisors (1).

101212506517 is an equidigital number, since it uses as much as digits as its factorization.

101212506517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 31.

Adding to 101212506517 its reverse (715605212101), we get a palindrome (816817718618).

The spelling of 101212506517 in words is "one hundred one billion, two hundred twelve million, five hundred six thousand, five hundred seventeen".