211662101121 has 4 divisors (see below), whose sum is σ = 282216134832. Its totient is φ = 141108067412.

The previous prime is 211662101087. The next prime is 211662101129. The reversal of 211662101121 is 121101266112.

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 211662101121 - 2³⁰ = 210588359297 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 211662101091 and 211662101100.

It is not an unprimeable number, because it can be changed into a prime (211662101129) 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, 35277016851 + ... + 35277016856.

It is an arithmetic number, because the mean of its divisors is an integer number (70554033708).

Almost surely, 2^211662101121 is an apocalyptic number.

It is an amenable number.

211662101121 is a deficient number, since it is larger than the sum of its proper divisors (70554033711).

211662101121 is an equidigital number, since it uses as much as digits as its factorization.

211662101121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70554033710.

The product of its (nonzero) digits is 288, while the sum is 24.

Adding to 211662101121 its reverse (121101266112), we get a palindrome (332763367233).

The spelling of 211662101121 in words is "two hundred eleven billion, six hundred sixty-two million, one hundred one thousand, one hundred twenty-one".