211100110121 has 4 divisors (see below), whose sum is σ = 211107535044. Its totient is φ = 211092685200.

The previous prime is 211100110103. The next prime is 211100110139. The reversal of 211100110121 is 121011001112.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (211100110103) and next prime (211100110139).

It can be written as a sum of positive squares in 2 ways, for example, as 27970890025 + 183129220096 = 167245^2 + 427936^2 .

It is a cyclic number.

It is not a de Polignac number, because 211100110121 - 2³⁰ = 210026368297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211100170121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3669650 + ... + 3726731.

It is an arithmetic number, because the mean of its divisors is an integer number (52776883761).

Almost surely, 2^211100110121 is an apocalyptic number.

It is an amenable number.

211100110121 is a deficient number, since it is larger than the sum of its proper divisors (7424923).

211100110121 is an equidigital number, since it uses as much as digits as its factorization.

211100110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7424922.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 211100110121 its reverse (121011001112), we get a palindrome (332111111233).

The spelling of 211100110121 in words is "two hundred eleven billion, one hundred million, one hundred ten thousand, one hundred twenty-one".