100003221321 has 4 divisors (see below), whose sum is σ = 133337628432. Its totient is φ = 66668814212.

The previous prime is 100003221317. The next prime is 100003221337. The reversal of 100003221321 is 123122300001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100003221321 - 2² = 100003221317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100003221321.

It is not an unprimeable number, because it can be changed into a prime (100003221121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16667203551 + ... + 16667203556.

It is an arithmetic number, because the mean of its divisors is an integer number (33334407108).

Almost surely, 2^100003221321 is an apocalyptic number.

It is an amenable number.

100003221321 is a deficient number, since it is larger than the sum of its proper divisors (33334407111).

100003221321 is an equidigital number, since it uses as much as digits as its factorization.

100003221321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33334407110.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 100003221321 its reverse (123122300001), we get a palindrome (223125521322).

The spelling of 100003221321 in words is "one hundred billion, three million, two hundred twenty-one thousand, three hundred twenty-one".