1231012013 has 24 divisors (see below), whose sum is σ = 1549805376. Its totient is φ = 957116160.

The previous prime is 1231011997. The next prime is 1231012043. The reversal of 1231012013 is 3102101321.

It is not a de Polignac number, because 1231012013 - 2⁴ = 1231011997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231012043) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 461981 + ... + 464637.

It is an arithmetic number, because the mean of its divisors is an integer number (64575224).

Almost surely, 2^1231012013 is an apocalyptic number.

It is an amenable number.

1231012013 is a deficient number, since it is larger than the sum of its proper divisors (318793363).

1231012013 is a wasteful number, since it uses less digits than its factorization.

1231012013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233 (or 3222 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1231012013 is about 35085.7807808234. The cubic root of 1231012013 is about 1071.7350407607.

Adding to 1231012013 its reverse (3102101321), we get a palindrome (4333113334).

The spelling of 1231012013 in words is "one billion, two hundred thirty-one million, twelve thousand, thirteen".