201022202021 has 8 divisors (see below), whose sum is σ = 212883237720. Its totient is φ = 189165188608.

The previous prime is 201022201979. The next prime is 201022202057. The reversal of 201022202021 is 120202220102.

It can be written as a sum of positive squares in 4 ways, for example, as 67815451396 + 133206750625 = 260414^2 + 364975^2 .

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 201022202021 - 2¹⁰ = 201022200997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 201022201987 and 201022202005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201022202071) 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, 902366 + ... + 1102863.

It is an arithmetic number, because the mean of its divisors is an integer number (26610404715).

Almost surely, 2^201022202021 is an apocalyptic number.

It is an amenable number.

201022202021 is a deficient number, since it is larger than the sum of its proper divisors (11861035699).

201022202021 is a wasteful number, since it uses less digits than its factorization.

201022202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011143.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 201022202021 its reverse (120202220102), we get a palindrome (321224422123).

The spelling of 201022202021 in words is "two hundred one billion, twenty-two million, two hundred two thousand, twenty-one".