201012012220021 has 2 divisors, whose sum is σ = 201012012220022. Its totient is φ = 201012012220020.

The previous prime is 201012012220003. The next prime is 201012012220079. The reversal of 201012012220021 is 120022210210102.

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., 156199029157521 + 44812983062500 = 12497961^2 + 6694250^2 .

It is a cyclic number.

It is not a de Polignac number, because 201012012220021 - 2³⁵ = 200977652481653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201012012219977 and 201012012220004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201012012227021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100506006110010 + 100506006110011.

It is an arithmetic number, because the mean of its divisors is an integer number (100506006110011).

Almost surely, 2^{201012012220021} is an apocalyptic number.

It is an amenable number.

201012012220021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201012012220021 is an equidigital number, since it uses as much as digits as its factorization.

201012012220021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 201012012220021 its reverse (120022210210102), we get a palindrome (321034222430123).

The spelling of 201012012220021 in words is "two hundred one trillion, twelve billion, twelve million, two hundred twenty thousand, twenty-one".