1121221011100 has 36 divisors (see below), whose sum is σ = 2441647004104. Its totient is φ = 446903628480.

The previous prime is 1121221011083. The next prime is 1121221011107. The reversal of 1121221011100 is 11101221211.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121221011107) 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, 19781259 + ... + 19837858.

Almost surely, 2^{1121221011100} is an apocalyptic number.

1121221011100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121221011100 is an abundant number, since it is smaller than the sum of its proper divisors (1320425993004).

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

1121221011100 is a wasteful number, since it uses less digits than its factorization.

1121221011100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39619414 (or 39619407 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1121221011100 its reverse (11101221211), we get a palindrome (1132322232311).

The spelling of 1121221011100 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, eleven thousand, one hundred".