13031123221000 has 32 divisors (see below), whose sum is σ = 30492828339480. Its totient is φ = 5212449288000.

The previous prime is 13031123220917. The next prime is 13031123221007. The reversal of 13031123221000 is 12232113031.

It can be written as a sum of positive squares in 4 ways, for example, as 5814840314404 + 7216282906596 = 2411398^2 + 2686314^2 .

It is not an unprimeable number, because it can be changed into a prime (13031123221007) 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, 6515560611 + ... + 6515562610.

Almost surely, 2^{13031123221000} is an apocalyptic number.

13031123221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13031123221000 is an abundant number, since it is smaller than the sum of its proper divisors (17461705118480).

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

13031123221000 is a wasteful number, since it uses less digits than its factorization.

13031123221000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13031123242 (or 13031123228 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13031123221000 its reverse (12232113031), we get a palindrome (13043355334031).

The spelling of 13031123221000 in words is "thirteen trillion, thirty-one billion, one hundred twenty-three million, two hundred twenty-one thousand".