20021321232001 has 8 divisors (see below), whose sum is σ = 21199213490400. Its totient is φ = 18843447582528.

The previous prime is 20021321231929. The next prime is 20021321232037. The reversal of 20021321232001 is 10023212312002.

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 20021321232001 - 2²¹ = 20021319134849 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 20021321232001.

It is not an unprimeable number, because it can be changed into a prime (20021321232041) 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 7 ways as a sum of consecutive naturals, for example, 2406151 + ... + 6769948.

It is an arithmetic number, because the mean of its divisors is an integer number (2649901686300).

Almost surely, 2^{20021321232001} is an apocalyptic number.

It is an amenable number.

20021321232001 is a deficient number, since it is larger than the sum of its proper divisors (1177892258399).

20021321232001 is a wasteful number, since it uses less digits than its factorization.

20021321232001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9304463.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 20021321232001 its reverse (10023212312002), we get a palindrome (30044533544003).

The spelling of 20021321232001 in words is "twenty trillion, twenty-one billion, three hundred twenty-one million, two hundred thirty-two thousand, one".