211020022111 has 4 divisors (see below), whose sum is σ = 211021003152. Its totient is φ = 211019041072.

The previous prime is 211020022061. The next prime is 211020022121. The reversal of 211020022111 is 111220020112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 211020022111 - 2⁷ = 211020021983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211020022091 and 211020022100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211020022121) 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, 12766 + ... + 649771.

It is an arithmetic number, because the mean of its divisors is an integer number (52755250788).

Almost surely, 2^211020022111 is an apocalyptic number.

211020022111 is a deficient number, since it is larger than the sum of its proper divisors (981041).

211020022111 is an equidigital number, since it uses as much as digits as its factorization.

211020022111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 981040.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 211020022111 its reverse (111220020112), we get a palindrome (322240042223).

The spelling of 211020022111 in words is "two hundred eleven billion, twenty million, twenty-two thousand, one hundred eleven".