201001122020021 has 2 divisors, whose sum is σ = 201001122020022. Its totient is φ = 201001122020020.

The previous prime is 201001122020011. The next prime is 201001122020029. The reversal of 201001122020021 is 120020221100102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199235906859025 + 1765215160996 = 14115095^2 + 1328614^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001122020021 - 2³⁴ = 200983942150837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201001122019978 and 201001122020005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201001122020029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500561010010 + 100500561010011.

It is an arithmetic number, because the mean of its divisors is an integer number (100500561010011).

Almost surely, 2^{201001122020021} is an apocalyptic number.

It is an amenable number.

201001122020021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001122020021 is an equidigital number, since it uses as much as digits as its factorization.

201001122020021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201001122020021 its reverse (120020221100102), we get a palindrome (321021343120123).

The spelling of 201001122020021 in words is "two hundred one trillion, one billion, one hundred twenty-two million, twenty thousand, twenty-one".