1100203312 has 20 divisors (see below), whose sum is σ = 2295616960. Its totient is φ = 507786048.

The previous prime is 1100203301. The next prime is 1100203333. The reversal of 1100203312 is 2133020011.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 1100203292 and 1100203301.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2644512 + ... + 2644927.

It is an arithmetic number, because the mean of its divisors is an integer number (114780848).

Almost surely, 2^1100203312 is an apocalyptic number.

It is an amenable number.

1100203312 is an abundant number, since it is smaller than the sum of its proper divisors (1195413648).

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

1100203312 is a wasteful number, since it uses less digits than its factorization.

1100203312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5289460 (or 5289454 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1100203312 is about 33169.3128056642. The cubic root of 1100203312 is about 1032.3437100036.

Adding to 1100203312 its reverse (2133020011), we get a palindrome (3233223323).

The spelling of 1100203312 in words is "one billion, one hundred million, two hundred three thousand, three hundred twelve".