201001202216021 has 2 divisors, whose sum is σ = 201001202216022. Its totient is φ = 201001202216020.

The previous prime is 201001202215823. The next prime is 201001202216039. The reversal of 201001202216021 is 120612202100102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111896834296900 + 89104367919121 = 10578130^2 + 9439511^2 .

It is a cyclic number.

It is not a de Polignac number, because 201001202216021 - 2³⁴ = 200984022346837 is a prime.

It is a super-2 number, since 2×201001202216021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 201001202215984 and 201001202216002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201001202210021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100500601108010 + 100500601108011.

It is an arithmetic number, because the mean of its divisors is an integer number (100500601108011).

Almost surely, 2^{201001202216021} is an apocalyptic number.

It is an amenable number.

201001202216021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201001202216021 is an equidigital number, since it uses as much as digits as its factorization.

201001202216021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 201001202216021 its reverse (120612202100102), we get a palindrome (321613404316123).

The spelling of 201001202216021 in words is "two hundred one trillion, one billion, two hundred two million, two hundred sixteen thousand, twenty-one".