1100120021100 has 54 divisors (see below), whose sum is σ = 3448265091180. Its totient is φ = 293365338720.

The previous prime is 1100120021081. The next prime is 1100120021131. The reversal of 1100120021100 is 11200210011.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 611176890 + ... + 611178689.

Almost surely, 2^{1100120021100} is an apocalyptic number.

1100120021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100120021100 is an abundant number, since it is smaller than the sum of its proper divisors (2348145070080).

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

1100120021100 is a wasteful number, since it uses less digits than its factorization.

1100120021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222355599 (or 1222355589 counting only the distinct ones).

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

Adding to 1100120021100 its reverse (11200210011), we get a palindrome (1111320231111).

The spelling of 1100120021100 in words is "one trillion, one hundred billion, one hundred twenty million, twenty-one thousand, one hundred".