1100321985 has 16 divisors (see below), whose sum is σ = 2012017536. Its totient is φ = 503004288.

The previous prime is 1100321983. The next prime is 1100321993. The reversal of 1100321985 is 5891230011.

It is not a de Polignac number, because 1100321985 - 2¹ = 1100321983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1100321983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5239524 + ... + 5239733.

It is an arithmetic number, because the mean of its divisors is an integer number (125751096).

Almost surely, 2^1100321985 is an apocalyptic number.

1100321985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1100321985 is a deficient number, since it is larger than the sum of its proper divisors (911695551).

1100321985 is a wasteful number, since it uses less digits than its factorization.

1100321985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10479272.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1100321985 is about 33171.1016549044. The cubic root of 1100321985 is about 1032.3808264526.

Adding to 1100321985 its reverse (5891230011), we get a palindrome (6991551996).

The spelling of 1100321985 in words is "one billion, one hundred million, three hundred twenty-one thousand, nine hundred eighty-five".