211121210101111 has 8 divisors (see below), whose sum is σ = 211200257024064. Its totient is φ = 211042166855520.

The previous prime is 211121210101099. The next prime is 211121210101159. The reversal of 211121210101111 is 111101012121112.

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 211121210101111 - 2⁹ = 211121210100599 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 (211121210101211) 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, 116738386 + ... + 118533088.

It is an arithmetic number, because the mean of its divisors is an integer number (26400032128008).

Almost surely, 2^{211121210101111} is an apocalyptic number.

211121210101111 is a deficient number, since it is larger than the sum of its proper divisors (79046922953).

211121210101111 is a wasteful number, since it uses less digits than its factorization.

211121210101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838681.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 211121210101111 its reverse (111101012121112), we get a palindrome (322222222222223).

The spelling of 211121210101111 in words is "two hundred eleven trillion, one hundred twenty-one billion, two hundred ten million, one hundred one thousand, one hundred eleven".