11155212100 has 36 divisors (see below), whose sum is σ = 24663554244. Its totient is φ = 4377892480.

The previous prime is 11155212041. The next prime is 11155212109. The reversal of 11155212100 is 121255111.

It can be written as a sum of positive squares in 6 ways, for example, as 50176 + 11155161924 = 224^2 + 105618^2 .

It is not an unprimeable number, because it can be changed into a prime (11155212109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1047079 + ... + 1057678.

It is an arithmetic number, because the mean of its divisors is an integer number (685098729).

Almost surely, 2^11155212100 is an apocalyptic number.

11155212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11155212100 is an abundant number, since it is smaller than the sum of its proper divisors (13508342144).

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

11155212100 is a wasteful number, since it uses less digits than its factorization.

11155212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2104824 (or 2104817 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 19.

Adding to 11155212100 its reverse (121255111), we get a palindrome (11276467211).

The spelling of 11155212100 in words is "eleven billion, one hundred fifty-five million, two hundred twelve thousand, one hundred".