2011124243540 has 24 divisors (see below), whose sum is σ = 4223487866472. Its totient is φ = 804425515520.

The previous prime is 2011124243539. The next prime is 2011124243591. The reversal of 2011124243540 is 453424211102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 23029883536 + 1988094360004 = 151756^2 + 1409998^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 821729 + ... + 2167368.

It is an arithmetic number, because the mean of its divisors is an integer number (175978661103).

Almost surely, 2^{2011124243540} is an apocalyptic number.

2011124243540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2011124243540 is an abundant number, since it is smaller than the sum of its proper divisors (2212363622932).

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

2011124243540 is a wasteful number, since it uses less digits than its factorization.

2011124243540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3022747 (or 3022745 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

Adding to 2011124243540 its reverse (453424211102), we get a palindrome (2464548454642).

The spelling of 2011124243540 in words is "two trillion, eleven billion, one hundred twenty-four million, two hundred forty-three thousand, five hundred forty".