21012010201201 has 2 divisors, whose sum is σ = 21012010201202. Its totient is φ = 21012010201200.

The previous prime is 21012010201153. The next prime is 21012010201277. The reversal of 21012010201201 is 10210201021012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20076000390625 + 936009810576 = 4480625^2 + 967476^2 .

It is a cyclic number.

It is not a de Polignac number, because 21012010201201 - 2⁷ = 21012010201073 is a prime.

It is not a weakly prime, because it can be changed into another prime (21012010201291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506005100600 + 10506005100601.

It is an arithmetic number, because the mean of its divisors is an integer number (10506005100601).

Almost surely, 2^{21012010201201} is an apocalyptic number.

It is an amenable number.

21012010201201 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012010201201 is an equidigital number, since it uses as much as digits as its factorization.

21012010201201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21012010201201 its reverse (10210201021012), we get a palindrome (31222211222213).

The spelling of 21012010201201 in words is "twenty-one trillion, twelve billion, ten million, two hundred one thousand, two hundred one".