11211204040 has 32 divisors (see below), whose sum is σ = 25243705080. Its totient is φ = 4481193472.

The previous prime is 11211204007. The next prime is 11211204061. The reversal of 11211204040 is 4040211211.

It is a happy number.

11211204040 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 4 ways, for example, as 11091038596 + 120165444 = 105314^2 + 10962^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 47149 + ... + 156988.

Almost surely, 2^11211204040 is an apocalyptic number.

11211204040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211204040 is an abundant number, since it is smaller than the sum of its proper divisors (14032501040).

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

11211204040 is a wasteful number, since it uses less digits than its factorization.

11211204040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205521 (or 205517 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 11211204040 its reverse (4040211211), we get a palindrome (15251415251).

The spelling of 11211204040 in words is "eleven billion, two hundred eleven million, two hundred four thousand, forty".