11201611275520 has 36 divisors (see below), whose sum is σ = 26831359511460. Its totient is φ = 4480644509696.

The previous prime is 11201611275509. The next prime is 11201611275521. The reversal of 11201611275520 is 2557211610211.

It can be written as a sum of positive squares in 2 ways, for example, as 2500244038656 + 8701367236864 = 1581216^2 + 2949808^2 .

It is a super-3 number, since 3×11201611275520³ (a number of 40 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201611275521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4375628125 + ... + 4375630684.

It is an arithmetic number, because the mean of its divisors is an integer number (745315541985).

Almost surely, 2^{11201611275520} is an apocalyptic number.

11201611275520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11201611275520 is an abundant number, since it is smaller than the sum of its proper divisors (15629748235940).

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

11201611275520 is an frugal number, since it uses more digits than its factorization.

11201611275520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8751258830 (or 8751258816 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 34.

Adding to 11201611275520 its reverse (2557211610211), we get a palindrome (13758822885731).

The spelling of 11201611275520 in words is "eleven trillion, two hundred one billion, six hundred eleven million, two hundred seventy-five thousand, five hundred twenty".