201001210221021 has 16 divisors (see below), whose sum is σ = 306604298440704. Its totient is φ = 114739056908784.

The previous prime is 201001210220969. The next prime is 201001210221043. The reversal of 201001210221021 is 120122012100102.

It is not a de Polignac number, because 201001210221021 - 2⁶ = 201001210220957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201001210221821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4949041845 + ... + 4949082458.

It is an arithmetic number, because the mean of its divisors is an integer number (19162768652544).

Almost surely, 2^{201001210221021} is an apocalyptic number.

201001210221021 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

201001210221021 is a deficient number, since it is larger than the sum of its proper divisors (105603088219683).

201001210221021 is an equidigital number, since it uses as much as digits as its factorization.

201001210221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9898125280.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 201001210221021 its reverse (120122012100102), we get a palindrome (321123222321123).

The spelling of 201001210221021 in words is "two hundred one trillion, one billion, two hundred ten million, two hundred twenty-one thousand, twenty-one".