201020010101 has 4 divisors (see below), whose sum is σ = 201318703212. Its totient is φ = 200721316992.

The previous prime is 201020010091. The next prime is 201020010119. The reversal of 201020010101 is 101010020102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78011283025 + 123008727076 = 279305^2 + 350726^2 .

It is a cyclic number.

It is not a de Polignac number, because 201020010101 - 2¹⁰ = 201020009077 is a prime.

It is a super-2 number, since 2×201020010101² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020010161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149345546 + ... + 149346891.

It is an arithmetic number, because the mean of its divisors is an integer number (50329675803).

Almost surely, 2^201020010101 is an apocalyptic number.

It is an amenable number.

201020010101 is a deficient number, since it is larger than the sum of its proper divisors (298693111).

201020010101 is an equidigital number, since it uses as much as digits as its factorization.

201020010101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298693110.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 201020010101 its reverse (101010020102), we get a palindrome (302030030203).

The spelling of 201020010101 in words is "two hundred one billion, twenty million, ten thousand, one hundred one".