211121111102 has 16 divisors (see below), whose sum is σ = 346134019824. Its totient is φ = 95779944000.

The previous prime is 211121111063. The next prime is 211121111107. The reversal of 211121111102 is 201111121112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121111107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9198149 + ... + 9221072.

It is an arithmetic number, because the mean of its divisors is an integer number (21633376239).

Almost surely, 2^211121111102 is an apocalyptic number.

211121111102 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

211121111102 is a deficient number, since it is larger than the sum of its proper divisors (135012908722).

211121111102 is a wasteful number, since it uses less digits than its factorization.

211121111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18419755.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 211121111102 its reverse (201111121112), we get a palindrome (412232232214).

It can be divided in two parts, 211121 and 111102, that added together give a palindrome (322223).

The spelling of 211121111102 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred eleven thousand, one hundred two".