1111221100100 has 18 divisors (see below), whose sum is σ = 2411349787434. Its totient is φ = 444488440000.

The previous prime is 1111221100097. The next prime is 1111221100111. The reversal of 1111221100100 is 10011221111.

It can be written as a sum of positive squares in 3 ways, for example, as 2041413124 + 1109179686976 = 45182^2 + 1053176^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5556105401 + ... + 5556105600.

Almost surely, 2^{1111221100100} is an apocalyptic number.

1111221100100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111221100100 is an abundant number, since it is smaller than the sum of its proper divisors (1300128687334).

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

1111221100100 is a wasteful number, since it uses less digits than its factorization.

1111221100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11112211015 (or 11112211008 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 1111221100100 its reverse (10011221111), we get a palindrome (1121232321211).

The spelling of 1111221100100 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred thousand, one hundred".