1120221100 has 36 divisors (see below), whose sum is σ = 2434312944. Its totient is φ = 447455680.

The previous prime is 1120221073. The next prime is 1120221107. The reversal of 1120221100 is 11220211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is not an unprimeable number, because it can be changed into a prime (1120221107) 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, 66762 + ... + 81838.

It is an arithmetic number, because the mean of its divisors is an integer number (67619804).

Almost surely, 2^1120221100 is an apocalyptic number.

1120221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1120221100 is an abundant number, since it is smaller than the sum of its proper divisors (1314091844).

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

1120221100 is a wasteful number, since it uses less digits than its factorization.

1120221100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15834 (or 15827 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1120221100 is about 33469.7042114208. The cubic root of 1120221100 is about 1038.5671528052.

Adding to 1120221100 its reverse (11220211), we get a palindrome (1131441311).

The spelling of 1120221100 in words is "one billion, one hundred twenty million, two hundred twenty-one thousand, one hundred".