1121121020 has 24 divisors (see below), whose sum is σ = 2362035984. Its totient is φ = 446985216.

The previous prime is 1121121019. The next prime is 1121121103. The reversal of 1121121020 is 201211211.

It is a junction number, because it is equal to n+sod(n) for n = 1121120992 and 1121121010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85157 + ... + 97436.

It is an arithmetic number, because the mean of its divisors is an integer number (98418166).

Almost surely, 2^1121121020 is an apocalyptic number.

1121121020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121121020 is an abundant number, since it is smaller than the sum of its proper divisors (1240914964).

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

1121121020 is a wasteful number, since it uses less digits than its factorization.

1121121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182909 (or 182907 counting only the distinct ones).

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

The square root of 1121121020 is about 33483.1453122313. The cubic root of 1121121020 is about 1038.8451863675.

Adding to 1121121020 its reverse (201211211), we get a palindrome (1322332231).

The spelling of 1121121020 in words is "one billion, one hundred twenty-one million, one hundred twenty-one thousand, twenty".