211121000111111 has 8 divisors (see below), whose sum is σ = 211402973193984. Its totient is φ = 210839029299000.

The previous prime is 211121000111089. The next prime is 211121000111113. The reversal of 211121000111111 is 111111000121112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211121000111111 - 2¹⁰ = 211121000110087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121000111113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274111196 + ... + 274880318.

It is an arithmetic number, because the mean of its divisors is an integer number (26425371649248).

Almost surely, 2^{211121000111111} is an apocalyptic number.

211121000111111 is a deficient number, since it is larger than the sum of its proper divisors (281973082873).

211121000111111 is an equidigital number, since it uses as much as digits as its factorization.

211121000111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135381.

The product of its (nonzero) digits is 4, while the sum is 14.

Adding to 211121000111111 its reverse (111111000121112), we get a palindrome (322232000232223).

It can be divided in two parts, 2111210001 and 11111, that added together give a palindrome (2111221112).

The spelling of 211121000111111 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred eleven thousand, one hundred eleven".