212100117 has 8 divisors (see below), whose sum is σ = 288136224. Its totient is φ = 138732048.

The previous prime is 212100079. The next prime is 212100121. The reversal of 212100117 is 711001212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212100117 - 2¹² = 212096021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212100096 and 212100105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212100127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666823 + ... + 667140.

It is an arithmetic number, because the mean of its divisors is an integer number (36017028).

Almost surely, 2^212100117 is an apocalyptic number.

It is an amenable number.

212100117 is a deficient number, since it is larger than the sum of its proper divisors (76036107).

212100117 is a wasteful number, since it uses less digits than its factorization.

212100117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334019.

The product of its (nonzero) digits is 28, while the sum is 15.

The square root of 212100117 is about 14563.6574046494. The cubic root of 212100117 is about 596.3670443415.

Adding to 212100117 its reverse (711001212), we get a palindrome (923101329).

The spelling of 212100117 in words is "two hundred twelve million, one hundred thousand, one hundred seventeen".