201200101021 has 2 divisors, whose sum is σ = 201200101022. Its totient is φ = 201200101020.

The previous prime is 201200101001. The next prime is 201200101153. The reversal of 201200101021 is 120101002102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201071528100 + 128572921 = 448410^2 + 11339^2 .

It is a cyclic number.

It is not a de Polignac number, because 201200101021 - 2⁹ = 201200100509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201200100989 and 201200101007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201200101001) 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, 100600050510 + 100600050511.

It is an arithmetic number, because the mean of its divisors is an integer number (100600050511).

Almost surely, 2^201200101021 is an apocalyptic number.

It is an amenable number.

201200101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201200101021 is an equidigital number, since it uses as much as digits as its factorization.

201200101021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201200101021 its reverse (120101002102), we get a palindrome (321301103123).

The spelling of 201200101021 in words is "two hundred one billion, two hundred million, one hundred one thousand, twenty-one".