211100010001 has 4 divisors (see below), whose sum is σ = 211121834292. Its totient is φ = 211078185712.

The previous prime is 211100009983. The next prime is 211100010019. The reversal of 211100010001 is 100010001112.

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

It is an interprime number because it is at equal distance from previous prime (211100009983) and next prime (211100010019).

It can be written as a sum of positive squares in 2 ways, for example, as 183102689025 + 27997320976 = 427905^2 + 167324^2 .

It is a cyclic number.

It is not a de Polignac number, because 211100010001 - 2¹⁵ = 211099977233 is a prime.

It is a Duffinian number.

211100010001 is a modest number, since divided by 10001 gives 2111 as remainder.

It is not an unprimeable number, because it can be changed into a prime (211100010041) 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, 10897630 + ... + 10916983.

It is an arithmetic number, because the mean of its divisors is an integer number (52780458573).

Almost surely, 2^211100010001 is an apocalyptic number.

It is an amenable number.

211100010001 is a deficient number, since it is larger than the sum of its proper divisors (21824291).

211100010001 is an equidigital number, since it uses as much as digits as its factorization.

211100010001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21824290.

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

Adding to 211100010001 its reverse (100010001112), we get a palindrome (311110011113).

The spelling of 211100010001 in words is "two hundred eleven billion, one hundred million, ten thousand, one".