1121010220 has 48 divisors (see below), whose sum is σ = 2650991616. Its totient is φ = 394488000.

The previous prime is 1121010197. The next prime is 1121010223. The reversal of 1121010220 is 220101211.

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

It is a junction number, because it is equal to n+sod(n) for n = 1121010197 and 1121010206.

It is not an unprimeable number, because it can be changed into a prime (1121010223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75366 + ... + 89005.

It is an arithmetic number, because the mean of its divisors is an integer number (55228992).

Almost surely, 2^1121010220 is an apocalyptic number.

1121010220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121010220 is an abundant number, since it is smaller than the sum of its proper divisors (1529981396).

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

1121010220 is a wasteful number, since it uses less digits than its factorization.

1121010220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164422 (or 164420 counting only the distinct ones).

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

The square root of 1121010220 is about 33481.4907075536. The cubic root of 1121010220 is about 1038.8109623373.

Adding to 1121010220 its reverse (220101211), we get a palindrome (1341111431).

Subtracting from 1121010220 its reverse (220101211), we obtain a palindrome (900909009).

The spelling of 1121010220 in words is "one billion, one hundred twenty-one million, ten thousand, two hundred twenty".