211100220001 has 4 divisors (see below), whose sum is σ = 230291149104. Its totient is φ = 191909290900.

The previous prime is 211100219977. The next prime is 211100220011. The reversal of 211100220001 is 100022001112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211100220001 - 2⁵ = 211100219969 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211100220001.

It is not an unprimeable number, because it can be changed into a prime (211100220011) 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, 9595464535 + ... + 9595464556.

It is an arithmetic number, because the mean of its divisors is an integer number (57572787276).

Almost surely, 2^211100220001 is an apocalyptic number.

It is an amenable number.

211100220001 is a deficient number, since it is larger than the sum of its proper divisors (19190929103).

211100220001 is a wasteful number, since it uses less digits than its factorization.

211100220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19190929102.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 211100220001 its reverse (100022001112), we get a palindrome (311122221113).

The spelling of 211100220001 in words is "two hundred eleven billion, one hundred million, two hundred twenty thousand, one".