1121101220 has 12 divisors (see below), whose sum is σ = 2354312604. Its totient is φ = 448440480.

The previous prime is 1121101217. The next prime is 1121101229. The reversal of 1121101220 is 221011211.

It can be written as a sum of positive squares in 2 ways, for example, as 346480996 + 774620224 = 18614^2 + 27832^2 .

It is not an unprimeable number, because it can be changed into a prime (1121101229) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28027511 + ... + 28027550.

It is an arithmetic number, because the mean of its divisors is an integer number (196192717).

Almost surely, 2^1121101220 is an apocalyptic number.

1121101220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121101220 is an abundant number, since it is smaller than the sum of its proper divisors (1233211384).

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

1121101220 is a wasteful number, since it uses less digits than its factorization.

1121101220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56055070 (or 56055068 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 1121101220 is about 33482.8496397783. The cubic root of 1121101220 is about 1038.8390706864.

Adding to 1121101220 its reverse (221011211), we get a palindrome (1342112431).

Subtracting from 1121101220 its reverse (221011211), we obtain a palindrome (900090009).

The spelling of 1121101220 in words is "one billion, one hundred twenty-one million, one hundred one thousand, two hundred twenty".