211111111110 has 16 divisors (see below), whose sum is σ = 506666666736. Its totient is φ = 56296296288.

The previous prime is 211111111091. The next prime is 211111111157. The reversal of 211111111110 is 11111111112.

211111111110 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3518518489 + ... + 3518518548.

It is an arithmetic number, because the mean of its divisors is an integer number (31666666671).

Almost surely, 2^211111111110 is an apocalyptic number.

211111111110 is an abundant number, since it is smaller than the sum of its proper divisors (295555555626).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211111111110 is a wasteful number, since it uses less digits than its factorization.

211111111110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037037047.

The product of its (nonzero) digits is 2, while the sum is 12.

Adding to 211111111110 its reverse (11111111112), we get a palindrome (222222222222).

The spelling of 211111111110 in words is "two hundred eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred ten".