201022022821 has 2 divisors, whose sum is σ = 201022022822. Its totient is φ = 201022022820.

The previous prime is 201022022813. The next prime is 201022022843. The reversal of 201022022821 is 128220220102.

It is an a-pointer prime, because the next prime (201022022843) can be obtained adding 201022022821 to its sum of digits (22).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147887162721 + 53134860100 = 384561^2 + 230510^2 .

It is a cyclic number.

It is not a de Polignac number, because 201022022821 - 2³ = 201022022813 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201022022792 and 201022022801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201022052821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100511011410 + 100511011411.

It is an arithmetic number, because the mean of its divisors is an integer number (100511011411).

Almost surely, 2^201022022821 is an apocalyptic number.

It is an amenable number.

201022022821 is a deficient number, since it is larger than the sum of its proper divisors (1).

201022022821 is an equidigital number, since it uses as much as digits as its factorization.

201022022821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 201022022821 its reverse (128220220102), we get a palindrome (329242242923).

The spelling of 201022022821 in words is "two hundred one billion, twenty-two million, twenty-two thousand, eight hundred twenty-one".