13223031012 has 18 divisors (see below), whose sum is σ = 33424884038. Its totient is φ = 4407676992.

The previous prime is 13223030987. The next prime is 13223031013. The reversal of 13223031012 is 21013032231.

13223031012 is a `hidden beast` number, since 1 + 322 + 30 + 310 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9616548096 + 3606482916 = 98064^2 + 60054^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (13223031013) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 183653173 + ... + 183653244.

Almost surely, 2^13223031012 is an apocalyptic number.

13223031012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13223031012 is an abundant number, since it is smaller than the sum of its proper divisors (20201853026).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13223031012 is a wasteful number, since it uses less digits than its factorization.

13223031012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367306427 (or 367306422 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 13223031012 its reverse (21013032231), we get a palindrome (34236063243).

The spelling of 13223031012 in words is "thirteen billion, two hundred twenty-three million, thirty-one thousand, twelve".