211420311111 has 16 divisors (see below), whose sum is σ = 313568428800. Its totient is φ = 140787955224.

The previous prime is 211420311101. The next prime is 211420311149. The reversal of 211420311111 is 111113024112.

211420311111 is a `hidden beast` number, since 211 + 420 + 31 + 1 + 1 + 1 + 1 = 666.

It is not a de Polignac number, because 211420311111 - 2³⁵ = 177060572743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211420311101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4390021 + ... + 4437918.

It is an arithmetic number, because the mean of its divisors is an integer number (19598026800).

Almost surely, 2^211420311111 is an apocalyptic number.

211420311111 is a deficient number, since it is larger than the sum of its proper divisors (102148117689).

211420311111 is an equidigital number, since it uses as much as digits as its factorization.

211420311111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8828835 (or 8828829 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 211420311111 its reverse (111113024112), we get a palindrome (322533335223).

The spelling of 211420311111 in words is "two hundred eleven billion, four hundred twenty million, three hundred eleven thousand, one hundred eleven".