2121320442 has 16 divisors (see below), whose sum is σ = 4322691360. Its totient is φ = 693765072.

The previous prime is 2121320363. The next prime is 2121320501. The reversal of 2121320442 is 2440231212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3335092 + ... + 3335727.

It is an arithmetic number, because the mean of its divisors is an integer number (270168210).

Almost surely, 2^2121320442 is an apocalyptic number.

2121320442 is an abundant number, since it is smaller than the sum of its proper divisors (2201370918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2121320442 is a wasteful number, since it uses less digits than its factorization.

2121320442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6670877.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2121320442 is about 46057.7945846303. The cubic root of 2121320442 is about 1284.8983133007.

Adding to 2121320442 its reverse (2440231212), we get a palindrome (4561551654).

The spelling of 2121320442 in words is "two billion, one hundred twenty-one million, three hundred twenty thousand, four hundred forty-two".