201012201221021 has 2 divisors, whose sum is σ = 201012201221022. Its totient is φ = 201012201221020.

The previous prime is 201012201220981. The next prime is 201012201221131. The reversal of 201012201221021 is 120122102210102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198722166703225 + 2290034517796 = 14096885^2 + 1513286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201012201221021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201012201227021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100506100610510 + 100506100610511.

It is an arithmetic number, because the mean of its divisors is an integer number (100506100610511).

Almost surely, 2^{201012201221021} is an apocalyptic number.

It is an amenable number.

201012201221021 is a deficient number, since it is larger than the sum of its proper divisors (1).

201012201221021 is an equidigital number, since it uses as much as digits as its factorization.

201012201221021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201012201221021 its reverse (120122102210102), we get a palindrome (321134303431123).

The spelling of 201012201221021 in words is "two hundred one trillion, twelve billion, two hundred one million, two hundred twenty-one thousand, twenty-one".