212100010117 has 2 divisors, whose sum is σ = 212100010118. Its totient is φ = 212100010116.

The previous prime is 212100010103. The next prime is 212100010121. The reversal of 212100010117 is 711010001212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191957020641 + 20142989476 = 438129^2 + 141926^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212100010117 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212100010117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212100010127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106050005058 + 106050005059.

It is an arithmetic number, because the mean of its divisors is an integer number (106050005059).

Almost surely, 2^212100010117 is an apocalyptic number.

It is an amenable number.

212100010117 is a deficient number, since it is larger than the sum of its proper divisors (1).

212100010117 is an equidigital number, since it uses as much as digits as its factorization.

212100010117 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 16.

Adding to 212100010117 its reverse (711010001212), we get a palindrome (923110011329).

The spelling of 212100010117 in words is "two hundred twelve billion, one hundred million, ten thousand, one hundred seventeen".