2011220240 has 80 divisors (see below), whose sum is σ = 4807406592. Its totient is φ = 782126592.

The previous prime is 2011220231. The next prime is 2011220297. The reversal of 2011220240 is 420221102.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588617 + ... + 592023.

Almost surely, 2^2011220240 is an apocalyptic number.

2011220240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2011220240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2403703296).

2011220240 is an abundant number, since it is smaller than the sum of its proper divisors (2796186352).

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

2011220240 is a wasteful number, since it uses less digits than its factorization.

2011220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3624 (or 3618 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2011220240 is about 44846.6301967049. The cubic root of 2011220240 is about 1262.2727603298.

Adding to 2011220240 its reverse (420221102), we get a palindrome (2431441342).

The spelling of 2011220240 in words is "two billion, eleven million, two hundred twenty thousand, two hundred forty".