211201211111 has 8 divisors (see below), whose sum is σ = 230404654224. Its totient is φ = 191998323520.

The previous prime is 211201211087. The next prime is 211201211129. The reversal of 211201211111 is 111112102112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211201211111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211204211111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351445 + ... + 1499601.

It is an arithmetic number, because the mean of its divisors is an integer number (28800581778).

Almost surely, 2^211201211111 is an apocalyptic number.

211201211111 is a deficient number, since it is larger than the sum of its proper divisors (19203443113).

211201211111 is a wasteful number, since it uses less digits than its factorization.

211201211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277761.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211201211111 its reverse (111112102112), we get a palindrome (322313313223).

The spelling of 211201211111 in words is "two hundred eleven billion, two hundred one million, two hundred eleven thousand, one hundred eleven".