11212135540 has 12 divisors (see below), whose sum is σ = 23545484676. Its totient is φ = 4484854208.

The previous prime is 11212135483. The next prime is 11212135541. The reversal of 11212135540 is 4553121211.

11212135540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1864339684 + 9347795856 = 43178^2 + 96684^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212135541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280303369 + ... + 280303408.

It is an arithmetic number, because the mean of its divisors is an integer number (1962123723).

Almost surely, 2^11212135540 is an apocalyptic number.

11212135540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212135540 is an abundant number, since it is smaller than the sum of its proper divisors (12333349136).

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

11212135540 is a wasteful number, since it uses less digits than its factorization.

11212135540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560606786 (or 560606784 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 11212135540 its reverse (4553121211), we get a palindrome (15765256751).

The spelling of 11212135540 in words is "eleven billion, two hundred twelve million, one hundred thirty-five thousand, five hundred forty".