2121101323 has 6 divisors (see below), whose sum is σ = 2331458612. Its totient is φ = 1928273820.

The previous prime is 2121101321. The next prime is 2121101369. The reversal of 2121101323 is 3231011212.

It is not a de Polignac number, because 2121101323 - 2¹ = 2121101321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2121101297 and 2121101306.

It is not an unprimeable number, because it can be changed into a prime (2121101321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8764761 + ... + 8765002.

Almost surely, 2^2121101323 is an apocalyptic number.

2121101323 is a deficient number, since it is larger than the sum of its proper divisors (210357289).

2121101323 is a wasteful number, since it uses less digits than its factorization.

2121101323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17529785 (or 17529774 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 2121101323 is about 46055.4157835970. The cubic root of 2121101323 is about 1284.8540711512.

Adding to 2121101323 its reverse (3231011212), we get a palindrome (5352112535).

The spelling of 2121101323 in words is "two billion, one hundred twenty-one million, one hundred one thousand, three hundred twenty-three".