10002131221 has 8 divisors (see below), whose sum is σ = 10727212320. Its totient is φ = 9296915472.

The previous prime is 10002131207. The next prime is 10002131239. The reversal of 10002131221 is 12213120001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10002131221 - 2¹⁵ = 10002098453 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 (10002131201) 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, 4965295 + ... + 4967308.

It is an arithmetic number, because the mean of its divisors is an integer number (1340901540).

Almost surely, 2^10002131221 is an apocalyptic number.

It is an amenable number.

10002131221 is a deficient number, since it is larger than the sum of its proper divisors (725081099).

10002131221 is an equidigital number, since it uses as much as digits as its factorization.

10002131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9932675.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 10002131221 its reverse (12213120001), we get a palindrome (22215251222).

The spelling of 10002131221 in words is "ten billion, two million, one hundred thirty-one thousand, two hundred twenty-one".