211110121 has 8 divisors (see below), whose sum is σ = 224514080. Its totient is φ = 197935488.

The previous prime is 211110113. The next prime is 211110127. The reversal of 211110121 is 121011112.

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 211110121 - 2³ = 211110113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211110098 and 211110107.

It is not an unprimeable number, because it can be changed into a prime (211110127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55431 + ... + 59116.

It is an arithmetic number, because the mean of its divisors is an integer number (28064260).

Almost surely, 2^211110121 is an apocalyptic number.

It is an amenable number.

211110121 is a deficient number, since it is larger than the sum of its proper divisors (13403959).

211110121 is a wasteful number, since it uses less digits than its factorization.

211110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114663.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 211110121 is about 14529.6290730356. The cubic root of 211110121 is about 595.4377316988.

Adding to 211110121 its reverse (121011112), we get a palindrome (332121233).

Subtracting from 211110121 its reverse (121011112), we obtain a palindrome (90099009).

The spelling of 211110121 in words is "two hundred eleven million, one hundred ten thousand, one hundred twenty-one".