10000131221 has 16 divisors (see below), whose sum is σ = 10643866560. Its totient is φ = 9362676480.

The previous prime is 10000131209. The next prime is 10000131223. The reversal of 10000131221 is 12213100001.

It is a cyclic number.

It is not a de Polignac number, because 10000131221 - 2¹⁰ = 10000130197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10000131223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4146506 + ... + 4148916.

It is an arithmetic number, because the mean of its divisors is an integer number (665241660).

Almost surely, 2^10000131221 is an apocalyptic number.

It is an amenable number.

10000131221 is a deficient number, since it is larger than the sum of its proper divisors (643735339).

10000131221 is a wasteful number, since it uses less digits than its factorization.

10000131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 10000131221 its reverse (12213100001), we get a palindrome (22213231222).

The spelling of 10000131221 in words is "ten billion, one hundred thirty-one thousand, two hundred twenty-one".