1001321103221 has 8 divisors (see below), whose sum is σ = 1003360987200. Its totient is φ = 999282221280.

The previous prime is 1001321103163. The next prime is 1001321103283. The reversal of 1001321103221 is 1223011231001.

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 1001321103221 - 2¹⁴ = 1001321086837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1001321103221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001321103121) 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, 1766600 + ... + 2263518.

It is an arithmetic number, because the mean of its divisors is an integer number (125420123400).

Almost surely, 2^{1001321103221} is an apocalyptic number.

It is an amenable number.

1001321103221 is a deficient number, since it is larger than the sum of its proper divisors (2039883979).

1001321103221 is an equidigital number, since it uses as much as digits as its factorization.

1001321103221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501019.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1001321103221 its reverse (1223011231001), we get a palindrome (2224332334222).

The spelling of 1001321103221 in words is "one trillion, one billion, three hundred twenty-one million, one hundred three thousand, two hundred twenty-one".