211100022011 has 4 divisors (see below), whose sum is σ = 211102768152. Its totient is φ = 211097275872.

The previous prime is 211100021971. The next prime is 211100022059. The reversal of 211100022011 is 110220001112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211100022011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211100021983 and 211100022001.

It is not an unprimeable number, because it can be changed into a prime (211100022611) 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, 1254341 + ... + 1412646.

It is an arithmetic number, because the mean of its divisors is an integer number (52775692038).

Almost surely, 2^211100022011 is an apocalyptic number.

211100022011 is a deficient number, since it is larger than the sum of its proper divisors (2746141).

211100022011 is an equidigital number, since it uses as much as digits as its factorization.

211100022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2746140.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 211100022011 its reverse (110220001112), we get a palindrome (321320023123).

The spelling of 211100022011 in words is "two hundred eleven billion, one hundred million, twenty-two thousand, eleven".