1131320100 has 36 divisors (see below), whose sum is σ = 3273287024. Its totient is φ = 301685280.

The previous prime is 1131320051. The next prime is 1131320111. The reversal of 1131320100 is 10231311.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1885234 + ... + 1885833.

Almost surely, 2^1131320100 is an apocalyptic number.

1131320100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131320100 is an abundant number, since it is smaller than the sum of its proper divisors (2141966924).

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

1131320100 is a wasteful number, since it uses less digits than its factorization.

1131320100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771084 (or 3771077 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1131320100 is about 33635.1021999339. The cubic root of 1131320100 is about 1041.9858813324.

Adding to 1131320100 its reverse (10231311), we get a palindrome (1141551411).

It can be divided in two parts, 11313 and 20100, that added together give a palindrome (31413).

The spelling of 1131320100 in words is "one billion, one hundred thirty-one million, three hundred twenty thousand, one hundred".