2101220444 has 12 divisors (see below), whose sum is σ = 3678351600. Its totient is φ = 1050262848.

The previous prime is 2101220419. The next prime is 2101220479. The reversal of 2101220444 is 4440221012.

It is a congruent 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, 72989 + ... + 97620.

It is an arithmetic number, because the mean of its divisors is an integer number (306529300).

Almost surely, 2^2101220444 is an apocalyptic number.

It is an amenable number.

2101220444 is a deficient number, since it is larger than the sum of its proper divisors (1577131156).

2101220444 is a wasteful number, since it uses less digits than its factorization.

2101220444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173692 (or 173690 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2101220444 is about 45839.0711511479. The cubic root of 2101220444 is about 1280.8271923675.

Adding to 2101220444 its reverse (4440221012), we get a palindrome (6541441456).

The spelling of 2101220444 in words is "two billion, one hundred one million, two hundred twenty thousand, four hundred forty-four".