2121331323 has 32 divisors (see below), whose sum is σ = 3122979840. Its totient is φ = 1275782400.

The previous prime is 2121331321. The next prime is 2121331337. The reversal of 2121331323 is 3231331212.

It is not a de Polignac number, because 2121331323 - 2¹ = 2121331321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121331323.

It is not an unprimeable number, because it can be changed into a prime (2121331321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88423 + ... + 109823.

It is an arithmetic number, because the mean of its divisors is an integer number (97593120).

Almost surely, 2^2121331323 is an apocalyptic number.

2121331323 is a deficient number, since it is larger than the sum of its proper divisors (1001648517).

2121331323 is a wasteful number, since it uses less digits than its factorization.

2121331323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21507.

The product of its digits is 648, while the sum is 21.

The square root of 2121331323 is about 46057.9127078073. The cubic root of 2121331323 is about 1284.9005101956.

Adding to 2121331323 its reverse (3231331212), we get a palindrome (5352662535).

The spelling of 2121331323 in words is "two billion, one hundred twenty-one million, three hundred thirty-one thousand, three hundred twenty-three".