2121043444 has 24 divisors (see below), whose sum is σ = 4062887528. Its totient is φ = 962893440.

The previous prime is 2121043433. The next prime is 2121043487. The reversal of 2121043444 is 4443401212.

It can be written as a sum of positive squares in 4 ways, for example, as 11478544 + 2109564900 = 3388^2 + 45930^2 .

It is a super-2 number, since 2×2121043444² = 8997650582670762272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331167 + ... + 337510.

Almost surely, 2^2121043444 is an apocalyptic number.

It is an amenable number.

2121043444 is a deficient number, since it is larger than the sum of its proper divisors (1941844084).

2121043444 is a wasteful number, since it uses less digits than its factorization.

2121043444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668755 (or 668753 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 2121043444 is about 46054.7874167279. The cubic root of 2121043444 is about 1284.8423843380.

Adding to 2121043444 its reverse (4443401212), we get a palindrome (6564444656).

The spelling of 2121043444 in words is "two billion, one hundred twenty-one million, forty-three thousand, four hundred forty-four".