1723201313221 has 24 divisors (see below), whose sum is σ = 1925387305920. Its totient is φ = 1535060032704.

The previous prime is 1723201313203. The next prime is 1723201313429. The reversal of 1723201313221 is 1223131023271.

It is not a de Polignac number, because 1723201313221 - 2¹³ = 1723201305029 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 1723201313221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1723201317221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 954801 + ... + 2087593.

It is an arithmetic number, because the mean of its divisors is an integer number (80224471080).

Almost surely, 2^{1723201313221} is an apocalyptic number.

It is an amenable number.

1723201313221 is a deficient number, since it is larger than the sum of its proper divisors (202185992699).

1723201313221 is a wasteful number, since it uses less digits than its factorization.

1723201313221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132953 (or 1132894 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

Adding to 1723201313221 its reverse (1223131023271), we get a palindrome (2946332336492).

The spelling of 1723201313221 in words is "one trillion, seven hundred twenty-three billion, two hundred one million, three hundred thirteen thousand, two hundred twenty-one".