201020222101 has 2 divisors, whose sum is σ = 201020222102. Its totient is φ = 201020222100.

The previous prime is 201020222071. The next prime is 201020222153. The reversal of 201020222101 is 101222020102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173130888100 + 27889334001 = 416090^2 + 167001^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020222101 - 2¹¹ = 201020220053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201020220101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510111050 + 100510111051.

It is an arithmetic number, because the mean of its divisors is an integer number (100510111051).

Almost surely, 2^201020222101 is an apocalyptic number.

It is an amenable number.

201020222101 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020222101 is an equidigital number, since it uses as much as digits as its factorization.

201020222101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201020222101 its reverse (101222020102), we get a palindrome (302242242203).

The spelling of 201020222101 in words is "two hundred one billion, twenty million, two hundred twenty-two thousand, one hundred one".