2121103031323 has 4 divisors (see below), whose sum is σ = 2121109763760. Its totient is φ = 2121096298888.

The previous prime is 2121103031309. The next prime is 2121103031351. The reversal of 2121103031323 is 3231303011212.

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

It is a cyclic number.

It is not a de Polignac number, because 2121103031323 - 2⁵ = 2121103031291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121103031294 and 2121103031303.

It is not an unprimeable number, because it can be changed into a prime (2121103031353) 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, 2869168 + ... + 3531901.

It is an arithmetic number, because the mean of its divisors is an integer number (530277440940).

Almost surely, 2^{2121103031323} is an apocalyptic number.

2121103031323 is a deficient number, since it is larger than the sum of its proper divisors (6732437).

2121103031323 is an equidigital number, since it uses as much as digits as its factorization.

2121103031323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6732436.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 2121103031323 its reverse (3231303011212), we get a palindrome (5352406042535).

The spelling of 2121103031323 in words is "two trillion, one hundred twenty-one billion, one hundred three million, thirty-one thousand, three hundred twenty-three".