100011221100 has 144 divisors (see below), whose sum is σ = 367448704000. Its totient is φ = 22859703360.

The previous prime is 100011221077. The next prime is 100011221147. The reversal of 100011221100 is 1122110001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2626900 + ... + 2664699.

Almost surely, 2^100011221100 is an apocalyptic number.

100011221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100011221100 is an abundant number, since it is smaller than the sum of its proper divisors (267437482900).

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

100011221100 is a wasteful number, since it uses less digits than its factorization.

100011221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5291629 (or 5291616 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 100011221100 its reverse (1122110001), we get a palindrome (101133331101).

The spelling of 100011221100 in words is "one hundred billion, eleven million, two hundred twenty-one thousand, one hundred".