1231123013 has 8 divisors (see below), whose sum is σ = 1237920768. Its totient is φ = 1224337104.

The previous prime is 1231122989. The next prime is 1231123039. The reversal of 1231123013 is 3103211321.

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

It is a cyclic number.

It is not a de Polignac number, because 1231123013 - 2⁸ = 1231122757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231122982 and 1231123000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231123043) 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 7 ways as a sum of consecutive naturals, for example, 273620 + ... + 278082.

It is an arithmetic number, because the mean of its divisors is an integer number (154740096).

Almost surely, 2^1231123013 is an apocalyptic number.

It is an amenable number.

1231123013 is a deficient number, since it is larger than the sum of its proper divisors (6797755).

1231123013 is a wasteful number, since it uses less digits than its factorization.

1231123013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923.

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

The square root of 1231123013 is about 35087.3625825596. The cubic root of 1231123013 is about 1071.7672524729.

Adding to 1231123013 its reverse (3103211321), we get a palindrome (4334334334).

The spelling of 1231123013 in words is "one billion, two hundred thirty-one million, one hundred twenty-three thousand, thirteen".