211201120211111 has 4 divisors (see below), whose sum is σ = 218483917459800. Its totient is φ = 203918322962424.

The previous prime is 211201120211089. The next prime is 211201120211149. The reversal of 211201120211111 is 111112021102112.

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 211201120211111 - 2⁶ = 211201120211047 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 211201120211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201120211611) 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, 3641398624301 + ... + 3641398624358.

It is an arithmetic number, because the mean of its divisors is an integer number (54620979364950).

Almost surely, 2^{211201120211111} is an apocalyptic number.

211201120211111 is a deficient number, since it is larger than the sum of its proper divisors (7282797248689).

211201120211111 is an equidigital number, since it uses as much as digits as its factorization.

211201120211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7282797248688.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 211201120211111 its reverse (111112021102112), we get a palindrome (322313141313223).

The spelling of 211201120211111 in words is "two hundred eleven trillion, two hundred one billion, one hundred twenty million, two hundred eleven thousand, one hundred eleven".