201022221091 has 2 divisors, whose sum is σ = 201022221092. Its totient is φ = 201022221090.

The previous prime is 201022221077. The next prime is 201022221131. The reversal of 201022221091 is 190122220102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201022221091 - 2¹⁹ = 201021696803 is a prime.

It is not a weakly prime, because it can be changed into another prime (201022221391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100511110545 + 100511110546.

It is an arithmetic number, because the mean of its divisors is an integer number (100511110546).

Almost surely, 2^201022221091 is an apocalyptic number.

201022221091 is a deficient number, since it is larger than the sum of its proper divisors (1).

201022221091 is an equidigital number, since it uses as much as digits as its factorization.

201022221091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 201022221091 its reverse (190122220102), we get a palindrome (391144441193).

The spelling of 201022221091 in words is "two hundred one billion, twenty-two million, two hundred twenty-one thousand, ninety-one".