2011111444 has 12 divisors (see below), whose sum is σ = 3672464544. Its totient is φ = 961835864.

The previous prime is 2011111433. The next prime is 2011111457. The reversal of 2011111444 is 4441111102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10929862 + ... + 10930045.

It is an arithmetic number, because the mean of its divisors is an integer number (306038712).

Almost surely, 2^2011111444 is an apocalyptic number.

It is an amenable number.

2011111444 is a deficient number, since it is larger than the sum of its proper divisors (1661353100).

2011111444 is a wasteful number, since it uses less digits than its factorization.

2011111444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21859934 (or 21859932 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 2011111444 is about 44845.4172017610. The cubic root of 2011111444 is about 1262.2499992383.

Adding to 2011111444 its reverse (4441111102), we get a palindrome (6452222546).

The spelling of 2011111444 in words is "two billion, eleven million, one hundred eleven thousand, four hundred forty-four".