20221020021001 has 4 divisors (see below), whose sum is σ = 20221041664404. Its totient is φ = 20220998377600.

The previous prime is 20221020020987. The next prime is 20221020021017. The reversal of 20221020021001 is 10012002012202.

It is a happy number.

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 13006697990400 + 7214322030601 = 3606480^2 + 2685949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20221020021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20221020021071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9353920 + ... + 11310961.

It is an arithmetic number, because the mean of its divisors is an integer number (5055260416101).

Almost surely, 2^{20221020021001} is an apocalyptic number.

It is an amenable number.

20221020021001 is a deficient number, since it is larger than the sum of its proper divisors (21643403).

20221020021001 is an equidigital number, since it uses as much as digits as its factorization.

20221020021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21643402.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 20221020021001 its reverse (10012002012202), we get a palindrome (30233022033203).

The spelling of 20221020021001 in words is "twenty trillion, two hundred twenty-one billion, twenty million, twenty-one thousand, one".