2121324443 has 16 divisors (see below), whose sum is σ = 2442080256. Its totient is φ = 1805029920.

The previous prime is 2121324433. The next prime is 2121324467. The reversal of 2121324443 is 3444231212.

It is a cyclic number.

It is not a de Polignac number, because 2121324443 - 2⁴ = 2121324427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2121324433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1490030 + ... + 1491452.

It is an arithmetic number, because the mean of its divisors is an integer number (152630016).

Almost surely, 2^2121324443 is an apocalyptic number.

2121324443 is a deficient number, since it is larger than the sum of its proper divisors (320755813).

2121324443 is a wasteful number, since it uses less digits than its factorization.

2121324443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2834.

The product of its digits is 4608, while the sum is 26.

The square root of 2121324443 is about 46057.8380191689. The cubic root of 2121324443 is about 1284.8991211112.

Adding to 2121324443 its reverse (3444231212), we get a palindrome (5565555655).

The spelling of 2121324443 in words is "two billion, one hundred twenty-one million, three hundred twenty-four thousand, four hundred forty-three".