211111111010 has 16 divisors (see below), whose sum is σ = 380372932800. Its totient is φ = 84361570416.

The previous prime is 211111110923. The next prime is 211111111027. The reversal of 211111111010 is 10111111112.

It is a happy number.

211111111010 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211111110982 and 211111111000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10348550 + ... + 10368929.

It is an arithmetic number, because the mean of its divisors is an integer number (23773308300).

Almost surely, 2^211111111010 is an apocalyptic number.

211111111010 is a deficient number, since it is larger than the sum of its proper divisors (169261821790).

211111111010 is a wasteful number, since it uses less digits than its factorization.

211111111010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20718505.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 211111111010 its reverse (10111111112), we get a palindrome (221222222122).

The spelling of 211111111010 in words is "two hundred eleven billion, one hundred eleven million, one hundred eleven thousand, ten".