2103211121 has 4 divisors (see below), whose sum is σ = 2294412144. Its totient is φ = 1912010100.

The previous prime is 2103210983. The next prime is 2103211129. The reversal of 2103211121 is 1211123012.

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 de Polignac number, because none of the positive numbers 2^k-2103211121 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 = 2103211096 and 2103211105.

It is not an unprimeable number, because it can be changed into a prime (2103211129) 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, 95600495 + ... + 95600516.

It is an arithmetic number, because the mean of its divisors is an integer number (573603036).

Almost surely, 2^2103211121 is an apocalyptic number.

It is an amenable number.

2103211121 is a deficient number, since it is larger than the sum of its proper divisors (191201023).

2103211121 is a wasteful number, since it uses less digits than its factorization.

2103211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191201022.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 2103211121 is about 45860.7797687741. The cubic root of 2103211121 is about 1281.2315460170.

Adding to 2103211121 its reverse (1211123012), we get a palindrome (3314334133).

The spelling of 2103211121 in words is "two billion, one hundred three million, two hundred eleven thousand, one hundred twenty-one".