2001123404 has 24 divisors (see below), whose sum is σ = 4052912640. Its totient is φ = 846767376.

The previous prime is 2001123401. The next prime is 2001123407. The reversal of 2001123404 is 4043211002.

It is an interprime number because it is at equal distance from previous prime (2001123401) and next prime (2001123407).

It is not an unprimeable number, because it can be changed into a prime (2001123401) 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, 450122 + ... + 454545.

It is an arithmetic number, because the mean of its divisors is an integer number (168871360).

Almost surely, 2^2001123404 is an apocalyptic number.

It is an amenable number.

2001123404 is an abundant number, since it is smaller than the sum of its proper divisors (2051789236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2001123404 is a wasteful number, since it uses less digits than its factorization.

2001123404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904757 (or 904755 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2001123404 is about 44733.9178252923. The cubic root of 2001123404 is about 1260.1569057980.

Adding to 2001123404 its reverse (4043211002), we get a palindrome (6044334406).

The spelling of 2001123404 in words is "two billion, one million, one hundred twenty-three thousand, four hundred four".