2121220121103 has 8 divisors (see below), whose sum is σ = 3142548327600. Its totient is φ = 1414146747384.

The previous prime is 2121220121071. The next prime is 2121220121159. The reversal of 2121220121103 is 3011210221212.

It is not a de Polignac number, because 2121220121103 - 2⁵ = 2121220121071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121220121183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39281854068 + ... + 39281854121.

It is an arithmetic number, because the mean of its divisors is an integer number (392818540950).

Almost surely, 2^{2121220121103} is an apocalyptic number.

2121220121103 is a deficient number, since it is larger than the sum of its proper divisors (1021328206497).

2121220121103 is an equidigital number, since it uses as much as digits as its factorization.

2121220121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78563708198 (or 78563708192 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 2121220121103 its reverse (3011210221212), we get a palindrome (5132430342315).

The spelling of 2121220121103 in words is "two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred twenty-one thousand, one hundred three".