2121100244 has 6 divisors (see below), whose sum is σ = 3711925434. Its totient is φ = 1060550120.

The previous prime is 2121100229. The next prime is 2121100249. The reversal of 2121100244 is 4420011212.

It can be written as a sum of positive squares in only one way, i.e., 2103139600 + 17960644 = 45860^2 + 4238^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121100249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265137527 + ... + 265137534.

It is an arithmetic number, because the mean of its divisors is an integer number (618654239).

Almost surely, 2^2121100244 is an apocalyptic number.

It is an amenable number.

2121100244 is a deficient number, since it is larger than the sum of its proper divisors (1590825190).

2121100244 is a wasteful number, since it uses less digits than its factorization.

2121100244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530275065 (or 530275063 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 2121100244 is about 46055.4040694466. The cubic root of 2121100244 is about 1284.8538532836.

Adding to 2121100244 its reverse (4420011212), we get a palindrome (6541111456).

The spelling of 2121100244 in words is "two billion, one hundred twenty-one million, one hundred thousand, two hundred forty-four".