2121022221103 has 4 divisors (see below), whose sum is σ = 2122488029200. Its totient is φ = 2119556413008.

The previous prime is 2121022221049. The next prime is 2121022221107. The reversal of 2121022221103 is 3011222201212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121022221103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121022221107) 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, 732901878 + ... + 732904771.

It is an arithmetic number, because the mean of its divisors is an integer number (530622007300).

Almost surely, 2^{2121022221103} is an apocalyptic number.

2121022221103 is a deficient number, since it is larger than the sum of its proper divisors (1465808097).

2121022221103 is a wasteful number, since it uses less digits than its factorization.

2121022221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465808096.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2121022221103 its reverse (3011222201212), we get a palindrome (5132244422315).

The spelling of 2121022221103 in words is "two trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, one hundred three".