212011117 has 2 divisors, whose sum is σ = 212011118. Its totient is φ = 212011116.

The previous prime is 212011087. The next prime is 212011153. The reversal of 212011117 is 711110212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207763396 + 4247721 = 14414^2 + 2061^2 .

It is a cyclic number.

It is not a de Polignac number, because 212011117 - 2⁷ = 212010989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212011117.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212011187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106005558 + 106005559.

It is an arithmetic number, because the mean of its divisors is an integer number (106005559).

Almost surely, 2^212011117 is an apocalyptic number.

It is an amenable number.

212011117 is a deficient number, since it is larger than the sum of its proper divisors (1).

212011117 is an equidigital number, since it uses as much as digits as its factorization.

212011117 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.

The square root of 212011117 is about 14560.6015329038. The cubic root of 212011117 is about 596.2836181851.

Adding to 212011117 its reverse (711110212), we get a palindrome (923121329).

The spelling of 212011117 in words is "two hundred twelve million, eleven thousand, one hundred seventeen".