2121442445 has 8 divisors (see below), whose sum is σ = 2587464600. Its totient is φ = 1669331520.

The previous prime is 2121442439. The next prime is 2121442447. The reversal of 2121442445 is 5442441212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3694084 + 2117748361 = 1922^2 + 46019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2121442445 - 2⁶ = 2121442381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121442447) 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 7 ways as a sum of consecutive naturals, for example, 3477470 + ... + 3478079.

It is an arithmetic number, because the mean of its divisors is an integer number (323433075).

Almost surely, 2^2121442445 is an apocalyptic number.

It is an amenable number.

2121442445 is a deficient number, since it is larger than the sum of its proper divisors (466022155).

2121442445 is an equidigital number, since it uses as much as digits as its factorization.

2121442445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6955615.

The product of its digits is 10240, while the sum is 29.

The square root of 2121442445 is about 46059.1190211016. The cubic root of 2121442445 is about 1284.9229455125.

Adding to 2121442445 its reverse (5442441212), we get a palindrome (7563883657).

The spelling of 2121442445 in words is "two billion, one hundred twenty-one million, four hundred forty-two thousand, four hundred forty-five".