20210021022001 has 2 divisors, whose sum is σ = 20210021022002. Its totient is φ = 20210021022000.

The previous prime is 20210021021989. The next prime is 20210021022029. The reversal of 20210021022001 is 10022012001202.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14213473045776 + 5996547976225 = 3770076^2 + 2448785^2 .

It is a cyclic number.

It is not a de Polignac number, because 20210021022001 - 2²⁹ = 20209484151089 is a prime.

It is not a weakly prime, because it can be changed into another prime (20210021422001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10105010511000 + 10105010511001.

It is an arithmetic number, because the mean of its divisors is an integer number (10105010511001).

Almost surely, 2^{20210021022001} is an apocalyptic number.

It is an amenable number.

20210021022001 is a deficient number, since it is larger than the sum of its proper divisors (1).

20210021022001 is an equidigital number, since it uses as much as digits as its factorization.

20210021022001 is an odious number, because the sum of its binary digits is odd.

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

Adding to 20210021022001 its reverse (10022012001202), we get a palindrome (30232033023203).

The spelling of 20210021022001 in words is "twenty trillion, two hundred ten billion, twenty-one million, twenty-two thousand, one".