11311221100 has 36 divisors (see below), whose sum is σ = 25337142208. Its totient is φ = 4378536000.

The previous prime is 11311221011. The next prime is 11311221101. The reversal of 11311221100 is 112211311.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (11311221101) 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, 1821291 + ... + 1827490.

Almost surely, 2^11311221100 is an apocalyptic number.

11311221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11311221100 is an abundant number, since it is smaller than the sum of its proper divisors (14025921108).

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

11311221100 is a wasteful number, since it uses less digits than its factorization.

11311221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3648826 (or 3648819 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11311221100 its reverse (112211311), we get a palindrome (11423432411).

The spelling of 11311221100 in words is "eleven billion, three hundred eleven million, two hundred twenty-one thousand, one hundred".