201020101220021 has 8 divisors (see below), whose sum is σ = 201328955926560. Its totient is φ = 200711289015952.

The previous prime is 201020101219991. The next prime is 201020101220039. The reversal of 201020101220021 is 120022101020102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201020101220021 - 2¹⁰ = 201020101218997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201020101219978 and 201020101220005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020101220921) 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 7 ways as a sum of consecutive naturals, for example, 1152650 + ... + 20084043.

It is an arithmetic number, because the mean of its divisors is an integer number (25166119490820).

Almost surely, 2^{201020101220021} is an apocalyptic number.

It is an amenable number.

201020101220021 is a deficient number, since it is larger than the sum of its proper divisors (308854706539).

201020101220021 is a wasteful number, since it uses less digits than its factorization.

201020101220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21251235.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 201020101220021 its reverse (120022101020102), we get a palindrome (321042202240123).

The spelling of 201020101220021 in words is "two hundred one trillion, twenty billion, one hundred one million, two hundred twenty thousand, twenty-one".