2121101121 has 4 divisors (see below), whose sum is σ = 2828134832. Its totient is φ = 1414067412.

The previous prime is 2121101083. The next prime is 2121101137. The reversal of 2121101121 is 1211011212.

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 not a de Polignac number, because 2121101121 - 2⁶ = 2121101057 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 = 2121101097 and 2121101106.

It is not an unprimeable number, because it can be changed into a prime (2121101141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353516851 + ... + 353516856.

It is an arithmetic number, because the mean of its divisors is an integer number (707033708).

Almost surely, 2^2121101121 is an apocalyptic number.

It is an amenable number.

2121101121 is a deficient number, since it is larger than the sum of its proper divisors (707033711).

2121101121 is an equidigital number, since it uses as much as digits as its factorization.

2121101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707033710.

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

The square root of 2121101121 is about 46055.4135905867. The cubic root of 2121101121 is about 1284.8540303641.

Adding to 2121101121 its reverse (1211011212), we get a palindrome (3332112333).

It can be divided in two parts, 2 and 121101121, that multiplied together give a palindrome (242202242).

The spelling of 2121101121 in words is "two billion, one hundred twenty-one million, one hundred one thousand, one hundred twenty-one".