211100101 has 4 divisors (see below), whose sum is σ = 223517772. Its totient is φ = 198682432.

The previous prime is 211100093. The next prime is 211100117. The reversal of 211100101 is 101001112.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67076100 + 144024001 = 8190^2 + 12001^2 .

It is a cyclic number.

It is not a de Polignac number, because 211100101 - 2³ = 211100093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6208810 + ... + 6208843.

It is an arithmetic number, because the mean of its divisors is an integer number (55879443).

Almost surely, 2^211100101 is an apocalyptic number.

It is an amenable number.

211100101 is a deficient number, since it is larger than the sum of its proper divisors (12417671).

211100101 is a wasteful number, since it uses less digits than its factorization.

211100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12417670.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 211100101 is about 14529.2842562874. The cubic root of 211100101 is about 595.4283110539.

Adding to 211100101 its reverse (101001112), we get a palindrome (312101213).

The spelling of 211100101 in words is "two hundred eleven million, one hundred thousand, one hundred one".