2101211121 has 8 divisors (see below), whose sum is σ = 2949068320. Its totient is φ = 1327080672.

The previous prime is 2101211113. The next prime is 2101211141. The reversal of 2101211121 is 1211121012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2101211121 - 2³ = 2101211113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2101211097 and 2101211106.

It is not an unprimeable number, because it can be changed into a prime (2101211141) 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 7 ways as a sum of consecutive naturals, for example, 18431620 + ... + 18431733.

It is an arithmetic number, because the mean of its divisors is an integer number (368633540).

Almost surely, 2^2101211121 is an apocalyptic number.

It is an amenable number.

2101211121 is a deficient number, since it is larger than the sum of its proper divisors (847857199).

2101211121 is a wasteful number, since it uses less digits than its factorization.

2101211121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36863375.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 2101211121 is about 45838.9694583113. The cubic root of 2101211121 is about 1280.8252980447.

Adding to 2101211121 its reverse (1211121012), we get a palindrome (3312332133).

The spelling of 2101211121 in words is "two billion, one hundred one million, two hundred eleven thousand, one hundred twenty-one".