2211121112111 has 4 divisors (see below), whose sum is σ = 2224686272472. Its totient is φ = 2197555951752.

The previous prime is 2211121112099. The next prime is 2211121112149. The reversal of 2211121112111 is 1112111211122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2211121112111 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2211121112111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211121112171) 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 3 ways as a sum of consecutive naturals, for example, 6782579936 + ... + 6782580261.

It is an arithmetic number, because the mean of its divisors is an integer number (556171568118).

Almost surely, 2^{2211121112111} is an apocalyptic number.

2211121112111 is a deficient number, since it is larger than the sum of its proper divisors (13565160361).

2211121112111 is a wasteful number, since it uses less digits than its factorization.

2211121112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13565160360.

The product of its digits is 16, while the sum is 17.

Adding to 2211121112111 its reverse (1112111211122), we get a palindrome (3323232323233).

It can be divided in two parts, 2211121 and 112111, that added together give a palindrome (2323232).

The spelling of 2211121112111 in words is "two trillion, two hundred eleven billion, one hundred twenty-one million, one hundred twelve thousand, one hundred eleven".