1231332103 has 4 divisors (see below), whose sum is σ = 1231727760. Its totient is φ = 1230936448.

The previous prime is 1231332079. The next prime is 1231332119. The reversal of 1231332103 is 3012331321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3012331321 = 23 ⋅130970927.

It is a cyclic number.

It is not a de Polignac number, because 1231332103 - 2¹³ = 1231323911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231332173) 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 3 ways as a sum of consecutive naturals, for example, 193123 + ... + 199396.

It is an arithmetic number, because the mean of its divisors is an integer number (307931940).

Almost surely, 2^1231332103 is an apocalyptic number.

1231332103 is a deficient number, since it is larger than the sum of its proper divisors (395657).

1231332103 is an equidigital number, since it uses as much as digits as its factorization.

1231332103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395656.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1231332103 is about 35090.3420188519. The cubic root of 1231332103 is about 1071.8279242138.

Adding to 1231332103 its reverse (3012331321), we get a palindrome (4243663424).

The spelling of 1231332103 in words is "one billion, two hundred thirty-one million, three hundred thirty-two thousand, one hundred three".