2001011240 has 16 divisors (see below), whose sum is σ = 4502275380. Its totient is φ = 800404480.

The previous prime is 2001011203. The next prime is 2001011251. The reversal of 2001011240 is 421101002.

It can be written as a sum of positive squares in 2 ways, for example, as 1925980996 + 75030244 = 43886^2 + 8662^2 .

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, 25012601 + ... + 25012680.

Almost surely, 2^2001011240 is an apocalyptic number.

2001011240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001011240 is an abundant number, since it is smaller than the sum of its proper divisors (2501264140).

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

2001011240 is a wasteful number, since it uses less digits than its factorization.

2001011240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50025292 (or 50025288 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2001011240 is about 44732.6641281290. The cubic root of 2001011240 is about 1260.1333612097.

Adding to 2001011240 its reverse (421101002), we get a palindrome (2422112242).

The spelling of 2001011240 in words is "two billion, one million, eleven thousand, two hundred forty".