11212124240 has 40 divisors (see below), whose sum is σ = 27601615080. Its totient is φ = 4221034496.

The previous prime is 11212124227. The next prime is 11212124243. The reversal of 11212124240 is 4242121211.

It can be written as a sum of positive squares in 4 ways, for example, as 1204922944 + 10007201296 = 34712^2 + 100036^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212124243) 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, 4120745 + ... + 4123464.

It is an arithmetic number, because the mean of its divisors is an integer number (690040377).

Almost surely, 2^11212124240 is an apocalyptic number.

11212124240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212124240 is an abundant number, since it is smaller than the sum of its proper divisors (16389490840).

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

11212124240 is a wasteful number, since it uses less digits than its factorization.

11212124240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8244239 (or 8244233 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 11212124240 its reverse (4242121211), we get a palindrome (15454245451).

The spelling of 11212124240 in words is "eleven billion, two hundred twelve million, one hundred twenty-four thousand, two hundred forty".