211121111110 has 32 divisors (see below), whose sum is σ = 467714463552. Its totient is φ = 66816351360.

The previous prime is 211121111107. The next prime is 211121111111. The reversal of 211121111110 is 11111121112.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121111111) 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, 115999701 + ... + 116001520.

It is an arithmetic number, because the mean of its divisors is an integer number (14616076986).

Almost surely, 2^211121111110 is an apocalyptic number.

211121111110 is an abundant number, since it is smaller than the sum of its proper divisors (256593352442).

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

211121111110 is a wasteful number, since it uses less digits than its factorization.

211121111110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232001248.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 211121111110 its reverse (11111121112), we get a palindrome (222232232222).

The spelling of 211121111110 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred ten".