1231013013 has 8 divisors (see below), whose sum is σ = 1641525888. Its totient is φ = 820587744.

The previous prime is 1231013011. The next prime is 1231013093. The reversal of 1231013013 is 3103101321.

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

It is not a de Polignac number, because 1231013013 - 2¹ = 1231013011 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1231012983 and 1231013001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231013011) 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, 25620 + ... + 55842.

It is an arithmetic number, because the mean of its divisors is an integer number (205190736).

Almost surely, 2^1231013013 is an apocalyptic number.

It is an amenable number.

1231013013 is a deficient number, since it is larger than the sum of its proper divisors (410512875).

1231013013 is a wasteful number, since it uses less digits than its factorization.

1231013013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43803.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 1231013013 is about 35085.7950316079. The cubic root of 1231013013 is about 1071.7353309649.

Adding to 1231013013 its reverse (3103101321), we get a palindrome (4334114334).

The spelling of 1231013013 in words is "one billion, two hundred thirty-one million, thirteen thousand, thirteen".