201022120261 has 2 divisors, whose sum is σ = 201022120262. Its totient is φ = 201022120260.

The previous prime is 201022120177. The next prime is 201022120349. The reversal of 201022120261 is 162021220102.

201022120261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119720152036 + 81301968225 = 346006^2 + 285135^2 .

It is a cyclic number.

It is not a de Polignac number, because 201022120261 - 2⁷ = 201022120133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201022120361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100511060130 + 100511060131.

It is an arithmetic number, because the mean of its divisors is an integer number (100511060131).

Almost surely, 2^201022120261 is an apocalyptic number.

It is an amenable number.

201022120261 is a deficient number, since it is larger than the sum of its proper divisors (1).

201022120261 is an equidigital number, since it uses as much as digits as its factorization.

201022120261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 201022120261 its reverse (162021220102), we get a palindrome (363043340363).

The spelling of 201022120261 in words is "two hundred one billion, twenty-two million, one hundred twenty thousand, two hundred sixty-one".