1100312020 has 24 divisors (see below), whose sum is σ = 2312770824. Its totient is φ = 439721856.

The previous prime is 1100312011. The next prime is 1100312027. The reversal of 1100312020 is 202130011.

It can be written as a sum of positive squares in 4 ways, for example, as 35856144 + 1064455876 = 5988^2 + 32626^2 .

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 = 1100311988 and 1100312006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100312027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2287 + ... + 46966.

It is an arithmetic number, because the mean of its divisors is an integer number (96365451).

Almost surely, 2^1100312020 is an apocalyptic number.

1100312020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1100312020 is an abundant number, since it is smaller than the sum of its proper divisors (1212458804).

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

1100312020 is a wasteful number, since it uses less digits than its factorization.

1100312020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50379 (or 50377 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1100312020 is about 33170.9514485189. The cubic root of 1100312020 is about 1032.3777098782.

Adding to 1100312020 its reverse (202130011), we get a palindrome (1302442031).

The spelling of 1100312020 in words is "one billion, one hundred million, three hundred twelve thousand, twenty".