1231323101 has 8 divisors (see below), whose sum is σ = 1352483520. Its totient is φ = 1115798112.

The previous prime is 1231323089. The next prime is 1231323167. The reversal of 1231323101 is 1013231321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231323101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231323101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231323901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1408400 + ... + 1409273.

It is an arithmetic number, because the mean of its divisors is an integer number (169060440).

Almost surely, 2^1231323101 is an apocalyptic number.

It is an amenable number.

1231323101 is a deficient number, since it is larger than the sum of its proper divisors (121160419).

1231323101 is a wasteful number, since it uses less digits than its factorization.

1231323101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817715.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1231323101 is about 35090.2137497052. The cubic root of 1231323101 is about 1071.8253122408.

Adding to 1231323101 its reverse (1013231321), we get a palindrome (2244554422).

The spelling of 1231323101 in words is "one billion, two hundred thirty-one million, three hundred twenty-three thousand, one hundred one".