211121221112 has 8 divisors (see below), whose sum is σ = 395852289600. Its totient is φ = 105560610552.

The previous prime is 211121221097. The next prime is 211121221169. The reversal of 211121221112 is 211122121112.

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13195076312 + ... + 13195076327.

It is an arithmetic number, because the mean of its divisors is an integer number (49481536200).

Almost surely, 2^211121221112 is an apocalyptic number.

It is an amenable number.

211121221112 is a deficient number, since it is larger than the sum of its proper divisors (184731068488).

211121221112 is a wasteful number, since it uses less digits than its factorization.

211121221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26390152645 (or 26390152641 counting only the distinct ones).

The product of its digits is 32, while the sum is 17.

Adding to 211121221112 its reverse (211122121112), we get a palindrome (422243342224).

The spelling of 211121221112 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".