1310321100221 has 8 divisors (see below), whose sum is σ = 1498638332160. Its totient is φ = 1122285994128.

The previous prime is 1310321100217. The next prime is 1310321100229. The reversal of 1310321100221 is 1220011230131.

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 1310321100221 - 2² = 1310321100217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1310321100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310321100229) 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, 70521506 + ... + 70540083.

It is an arithmetic number, because the mean of its divisors is an integer number (187329791520).

Almost surely, 2^{1310321100221} is an apocalyptic number.

It is an amenable number.

1310321100221 is a deficient number, since it is larger than the sum of its proper divisors (188317231939).

1310321100221 is a wasteful number, since it uses less digits than its factorization.

1310321100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141062923.

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

Adding to 1310321100221 its reverse (1220011230131), we get a palindrome (2530332330352).

The spelling of 1310321100221 in words is "one trillion, three hundred ten billion, three hundred twenty-one million, one hundred thousand, two hundred twenty-one".