2011123444 has 24 divisors (see below), whose sum is σ = 3854735136. Its totient is φ = 910500000.

The previous prime is 2011123441. The next prime is 2011123453. The reversal of 2011123444 is 4443211102.

It is a happy number.

It is a super-2 number, since 2×2011123444² = 8089235014012842272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2011123441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80007 + ... + 102094.

It is an arithmetic number, because the mean of its divisors is an integer number (160613964).

Almost surely, 2^2011123444 is an apocalyptic number.

It is an amenable number.

2011123444 is a deficient number, since it is larger than the sum of its proper divisors (1843611692).

2011123444 is a wasteful number, since it uses less digits than its factorization.

2011123444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182367 (or 182365 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 2011123444 is about 44845.5509944967. The cubic root of 2011123444 is about 1262.2525097854.

Adding to 2011123444 its reverse (4443211102), we get a palindrome (6454334546).

The spelling of 2011123444 in words is "two billion, eleven million, one hundred twenty-three thousand, four hundred forty-four".