1231133330 has 32 divisors (see below), whose sum is σ = 2584310400. Its totient is φ = 422101680.

The previous prime is 1231133269. The next prime is 1231133347. The reversal of 1231133330 is 333311321.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 176036 + ... + 182895.

It is an arithmetic number, because the mean of its divisors is an integer number (80759700).

Almost surely, 2^1231133330 is an apocalyptic number.

1231133330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231133330 is an abundant number, since it is smaller than the sum of its proper divisors (1353177070).

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

1231133330 is an equidigital number, since it uses as much as digits as its factorization.

1231133330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358959 (or 358945 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 1231133330 is about 35087.5096009962. The cubic root of 1231133330 is about 1071.7702463226.

Adding to 1231133330 its reverse (333311321), we get a palindrome (1564444651).

The spelling of 1231133330 in words is "one billion, two hundred thirty-one million, one hundred thirty-three thousand, three hundred thirty".