20201312321 has 8 divisors (see below), whose sum is σ = 21240546624. Its totient is φ = 19175487760.

The previous prime is 20201312309. The next prime is 20201312353. The reversal of 20201312321 is 12321310202.

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 20201312321 - 2¹⁰ = 20201311297 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 20201312321.

It is not an unprimeable number, because it can be changed into a prime (20201312371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3349346 + ... + 3355371.

It is an arithmetic number, because the mean of its divisors is an integer number (2655068328).

Almost surely, 2^20201312321 is an apocalyptic number.

It is an amenable number.

20201312321 is a deficient number, since it is larger than the sum of its proper divisors (1039234303).

20201312321 is a wasteful number, since it uses less digits than its factorization.

20201312321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6704871.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 20201312321 its reverse (12321310202), we get a palindrome (32522622523).

The spelling of 20201312321 in words is "twenty billion, two hundred one million, three hundred twelve thousand, three hundred twenty-one".