1131252100 has 36 divisors (see below), whose sum is σ = 2677984848. Its totient is φ = 411364000.

The previous prime is 1131252037. The next prime is 1131252103. The reversal of 1131252100 is 12521311.

It is not an unprimeable number, because it can be changed into a prime (1131252103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 513106 + ... + 515305.

It is an arithmetic number, because the mean of its divisors is an integer number (74388468).

Almost surely, 2^1131252100 is an apocalyptic number.

1131252100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1131252100 is an abundant number, since it is smaller than the sum of its proper divisors (1546732748).

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

1131252100 is a wasteful number, since it uses less digits than its factorization.

1131252100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1028436 (or 1028429 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 1131252100 is about 33634.0913360239. The cubic root of 1131252100 is about 1041.9650041113.

Adding to 1131252100 its reverse (12521311), we get a palindrome (1143773411).

The spelling of 1131252100 in words is "one billion, one hundred thirty-one million, two hundred fifty-two thousand, one hundred".