1121286020 has 48 divisors (see below), whose sum is σ = 2403798768. Its totient is φ = 439196160.

The previous prime is 1121286011. The next prime is 1121286043. The reversal of 1121286020 is 206821211.

It can be written as a sum of positive squares in 8 ways, for example, as 114746944 + 1006539076 = 10712^2 + 31726^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1056290 + ... + 1057350.

It is an arithmetic number, because the mean of its divisors is an integer number (50079141).

Almost surely, 2^1121286020 is an apocalyptic number.

1121286020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121286020 is an abundant number, since it is smaller than the sum of its proper divisors (1282512748).

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

1121286020 is a wasteful number, since it uses less digits than its factorization.

1121286020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120 (or 2118 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1121286020 is about 33485.6091478115. The cubic root of 1121286020 is about 1038.8961475763.

The spelling of 1121286020 in words is "one billion, one hundred twenty-one million, two hundred eighty-six thousand, twenty".