1231214013 has 20 divisors (see below), whose sum is σ = 1850254560. Its totient is φ = 815885352.

The previous prime is 1231213993. The next prime is 1231214027. The reversal of 1231214013 is 3104121321.

It is not a de Polignac number, because 1231214013 - 2⁵ = 1231213981 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231214063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31983 + ... + 59036.

It is an arithmetic number, because the mean of its divisors is an integer number (92512728).

Almost surely, 2^1231214013 is an apocalyptic number.

It is an amenable number.

1231214013 is a deficient number, since it is larger than the sum of its proper divisors (619040547).

1231214013 is an equidigital number, since it uses as much as digits as its factorization.

1231214013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91198 (or 91189 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1231214013 is about 35088.6593217809. The cubic root of 1231214013 is about 1071.7936588287.

Adding to 1231214013 its reverse (3104121321), we get a palindrome (4335335334).

The spelling of 1231214013 in words is "one billion, two hundred thirty-one million, two hundred fourteen thousand, thirteen".