1231130135 has 8 divisors (see below), whose sum is σ = 1477570416. Its totient is φ = 984761280.

The previous prime is 1231130129. The next prime is 1231130143. The reversal of 1231130135 is 5310311321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1231130135 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33500 + ... + 59870.

It is an arithmetic number, because the mean of its divisors is an integer number (184696302).

Almost surely, 2^1231130135 is an apocalyptic number.

1231130135 is a deficient number, since it is larger than the sum of its proper divisors (246440281).

1231130135 is an equidigital number, since it uses as much as digits as its factorization.

1231130135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35713.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 1231130135 is about 35087.4640719446. The cubic root of 1231130135 is about 1071.7693191799.

Adding to 1231130135 its reverse (5310311321), we get a palindrome (6541441456).

The spelling of 1231130135 in words is "one billion, two hundred thirty-one million, one hundred thirty thousand, one hundred thirty-five".