11211321100 has 72 divisors (see below), whose sum is σ = 28116637920. Its totient is φ = 3800670720.

The previous prime is 11211321097. The next prime is 11211321131. The reversal of 11211321100 is 112311211.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27679 + ... + 152278.

It is an arithmetic number, because the mean of its divisors is an integer number (390508860).

Almost surely, 2^11211321100 is an apocalyptic number.

11211321100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11211321100 is an abundant number, since it is smaller than the sum of its proper divisors (16905316820).

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

11211321100 is a wasteful number, since it uses less digits than its factorization.

11211321100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180067 (or 180060 counting only the distinct ones).

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

Adding to 11211321100 its reverse (112311211), we get a palindrome (11323632311).

The spelling of 11211321100 in words is "eleven billion, two hundred eleven million, three hundred twenty-one thousand, one hundred".