1231113013 has 8 divisors (see below), whose sum is σ = 1368582656. Its totient is φ = 1099753200.

The previous prime is 1231112977. The next prime is 1231113061. The reversal of 1231113013 is 3103111321.

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-1231113013 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 (1231113413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1527033 + ... + 1527838.

It is an arithmetic number, because the mean of its divisors is an integer number (171072832).

Almost surely, 2^1231113013 is an apocalyptic number.

1231113013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1231113013 is a deficient number, since it is larger than the sum of its proper divisors (137469643).

1231113013 is a wasteful number, since it uses less digits than its factorization.

1231113013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054915.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 1231113013 is about 35087.2200808214. The cubic root of 1231113013 is about 1071.7643505962.

Adding to 1231113013 its reverse (3103111321), we get a palindrome (4334224334).

It can be divided in two parts, 1231 and 113013, that added together give a square (114244 = 338²).

The spelling of 1231113013 in words is "one billion, two hundred thirty-one million, one hundred thirteen thousand, thirteen".