20321322213001 has 4 divisors (see below), whose sum is σ = 20469653032212. Its totient is φ = 20172991393792.

The previous prime is 20321322212999. The next prime is 20321322213061. The reversal of 20321322213001 is 10031222312302.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15098159353225 + 5223162859776 = 3885635^2 + 2285424^2 .

It is a cyclic number.

It is not a de Polignac number, because 20321322213001 - 2¹ = 20321322212999 is a prime.

It is a super-2 number, since 2×20321322213001² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20321322213061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74165409400 + ... + 74165409673.

It is an arithmetic number, because the mean of its divisors is an integer number (5117413258053).

Almost surely, 2^{20321322213001} is an apocalyptic number.

It is an amenable number.

20321322213001 is a deficient number, since it is larger than the sum of its proper divisors (148330819211).

20321322213001 is a wasteful number, since it uses less digits than its factorization.

20321322213001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148330819210.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 20321322213001 its reverse (10031222312302), we get a palindrome (30352544525303).

The spelling of 20321322213001 in words is "twenty trillion, three hundred twenty-one billion, three hundred twenty-two million, two hundred thirteen thousand, one".