201001022020021 has 2 divisors, whose sum is σ = 201001022020022. Its totient is φ = 201001022020020.

The previous prime is 201001022019977. The next prime is 201001022020067. The reversal of 201001022020021 is 120020220100102.

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., 200991440351025 + 9581668996 = 14177145^2 + 97886^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001022020021 - 2⁴⁷ = 60263533664693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201001022019983 and 201001022020010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201001022027021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500511010010 + 100500511010011.

It is an arithmetic number, because the mean of its divisors is an integer number (100500511010011).

Almost surely, 2^{201001022020021} is an apocalyptic number.

It is an amenable number.

201001022020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001022020021 is an equidigital number, since it uses as much as digits as its factorization.

201001022020021 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 201001022020021 its reverse (120020220100102), we get a palindrome (321021242120123).

The spelling of 201001022020021 in words is "two hundred one trillion, one billion, twenty-two million, twenty thousand, twenty-one".