211200020111 has 4 divisors (see below), whose sum is σ = 211365409032. Its totient is φ = 211034631192.

The previous prime is 211200020107. The next prime is 211200020131. The reversal of 211200020111 is 111020002112.

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

It is a cyclic number.

It is not a de Polignac number, because 211200020111 - 2² = 211200020107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211200020092 and 211200020101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211200020131) 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, 82692545 + ... + 82695098.

It is an arithmetic number, because the mean of its divisors is an integer number (52841352258).

Almost surely, 2^211200020111 is an apocalyptic number.

211200020111 is a deficient number, since it is larger than the sum of its proper divisors (165388921).

211200020111 is a wasteful number, since it uses less digits than its factorization.

211200020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165388920.

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

Adding to 211200020111 its reverse (111020002112), we get a palindrome (322220022223).

The spelling of 211200020111 in words is "two hundred eleven billion, two hundred million, twenty thousand, one hundred eleven".