201020220021 has 8 divisors (see below), whose sum is σ = 268443800800. Its totient is φ = 133805059632.

The previous prime is 201020220017. The next prime is 201020220053. The reversal of 201020220021 is 120022020102.

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

It is not a de Polignac number, because 201020220021 - 2² = 201020220017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201020219979 and 201020220006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020228021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52102846 + ... + 52106703.

It is an arithmetic number, because the mean of its divisors is an integer number (33555475100).

Almost surely, 2^201020220021 is an apocalyptic number.

It is an amenable number.

201020220021 is a deficient number, since it is larger than the sum of its proper divisors (67423580779).

201020220021 is a wasteful number, since it uses less digits than its factorization.

201020220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104210195.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 201020220021 its reverse (120022020102), we get a palindrome (321042240123).

The spelling of 201020220021 in words is "two hundred one billion, twenty million, two hundred twenty thousand, twenty-one".