211121211112111 has 8 divisors (see below), whose sum is σ = 215130278029104. Its totient is φ = 207113094115200.

The previous prime is 211121211112099. The next prime is 211121211112139. The reversal of 211121211112111 is 111211112121112.

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 211121211112111 - 2⁷ = 211121211111983 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 (211121211112171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237031290 + ... + 237920311.

It is an arithmetic number, because the mean of its divisors is an integer number (26891284753638).

Almost surely, 2^{211121211112111} is an apocalyptic number.

211121211112111 is a deficient number, since it is larger than the sum of its proper divisors (4009066916993).

211121211112111 is an equidigital number, since it uses as much as digits as its factorization.

211121211112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474960041.

The product of its digits is 16, while the sum is 19.

Adding to 211121211112111 its reverse (111211112121112), we get a palindrome (322332323233223).

The spelling of 211121211112111 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twelve thousand, one hundred eleven".