1100201985 has 12 divisors (see below), whose sum is σ = 1907016852. Its totient is φ = 586774368.

The previous prime is 1100201983. The next prime is 1100202007. The reversal of 1100201985 is 5891020011.

It can be written as a sum of positive squares in 2 ways, for example, as 773062416 + 327139569 = 27804^2 + 18087^2 .

It is not a de Polignac number, because 1100201985 - 2¹ = 1100201983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1100201983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12224422 + ... + 12224511.

It is an arithmetic number, because the mean of its divisors is an integer number (158918071).

Almost surely, 2^1100201985 is an apocalyptic number.

1100201985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1100201985 is a deficient number, since it is larger than the sum of its proper divisors (806814867).

1100201985 is a wasteful number, since it uses less digits than its factorization.

1100201985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24448944 (or 24448941 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 1100201985 is about 33169.2928022290. The cubic root of 1100201985 is about 1032.3432949528.

Adding to 1100201985 its reverse (5891020011), we get a palindrome (6991221996).

The spelling of 1100201985 in words is "one billion, one hundred million, two hundred one thousand, nine hundred eighty-five".