1101200985 has 24 divisors (see below), whose sum is σ = 1934901384. Its totient is φ = 579260160.

The previous prime is 1101200977. The next prime is 1101200999. The reversal of 1101200985 is 5890021011.

It can be written as a sum of positive squares in 4 ways, for example, as 36614601 + 1064586384 = 6051^2 + 32628^2 .

It is not a de Polignac number, because 1101200985 - 2³ = 1101200977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164326 + ... + 170895.

It is an arithmetic number, because the mean of its divisors is an integer number (80620891).

Almost surely, 2^1101200985 is an apocalyptic number.

1101200985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1101200985 is a deficient number, since it is larger than the sum of its proper divisors (833700399).

1101200985 is a wasteful number, since it uses less digits than its factorization.

1101200985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335305 (or 335302 counting only the distinct ones).

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

The square root of 1101200985 is about 33184.3484944333. The cubic root of 1101200985 is about 1032.6556615226.

Adding to 1101200985 its reverse (5890021011), we get a palindrome (6991221996).

The spelling of 1101200985 in words is "one billion, one hundred one million, two hundred thousand, nine hundred eighty-five".