2121245444 has 12 divisors (see below), whose sum is σ = 3712501968. Its totient is φ = 1060530600.

The previous prime is 2121245419. The next prime is 2121245459. The reversal of 2121245444 is 4445421212.

It is a happy number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 79079 + ... + 102449.

It is an arithmetic number, because the mean of its divisors is an integer number (309375164).

Almost surely, 2^2121245444 is an apocalyptic number.

It is an amenable number.

2121245444 is a deficient number, since it is larger than the sum of its proper divisors (1591256524).

2121245444 is a wasteful number, since it uses less digits than its factorization.

2121245444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46066 (or 46064 counting only the distinct ones).

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

The square root of 2121245444 is about 46056.9804047117. The cubic root of 2121245444 is about 1284.8831708549.

Adding to 2121245444 its reverse (4445421212), we get a palindrome (6566666656).

The spelling of 2121245444 in words is "two billion, one hundred twenty-one million, two hundred forty-five thousand, four hundred forty-four".