211121101110121 has 4 divisors (see below), whose sum is σ = 211248053066752. Its totient is φ = 210994149153492.

The previous prime is 211121101110119. The next prime is 211121101110181. The reversal of 211121101110121 is 121011101121112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 211121101110121 - 2¹ = 211121101110119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211121101110095 and 211121101110104.

It is not an unprimeable number, because it can be changed into a prime (211121101110181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63475975821 + ... + 63475979146.

It is an arithmetic number, because the mean of its divisors is an integer number (52812013266688).

Almost surely, 2^{211121101110121} is an apocalyptic number.

It is an amenable number.

211121101110121 is a deficient number, since it is larger than the sum of its proper divisors (126951956631).

211121101110121 is a wasteful number, since it uses less digits than its factorization.

211121101110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126951956630.

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

Adding to 211121101110121 its reverse (121011101121112), we get a palindrome (332132202231233).

The spelling of 211121101110121 in words is "two hundred eleven trillion, one hundred twenty-one billion, one hundred one million, one hundred ten thousand, one hundred twenty-one".