2121330442 has 48 divisors (see below), whose sum is σ = 4079835648. Its totient is φ = 817931520.

The previous prime is 2121330439. The next prime is 2121330451. The reversal of 2121330442 is 2440331212.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94423 + ... + 114709.

It is an arithmetic number, because the mean of its divisors is an integer number (84996576).

Almost surely, 2^2121330442 is an apocalyptic number.

2121330442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2121330442 is a deficient number, since it is larger than the sum of its proper divisors (1958505206).

2121330442 is a wasteful number, since it uses less digits than its factorization.

2121330442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20411 (or 20404 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 2121330442 is about 46057.9031437602. The cubic root of 2121330442 is about 1284.9003323203.

Adding to 2121330442 its reverse (2440331212), we get a palindrome (4561661654).

The spelling of 2121330442 in words is "two billion, one hundred twenty-one million, three hundred thirty thousand, four hundred forty-two".