201020011 has 2 divisors, whose sum is σ = 201020012. Its totient is φ = 201020010.

The previous prime is 201020009. The next prime is 201020041. The reversal of 201020011 is 110020102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201020011 - 2¹ = 201020009 is a prime.

Together with 201020009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 201019976 and 201020003.

It is not a weakly prime, because it can be changed into another prime (201020041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510005 + 100510006.

It is an arithmetic number, because the mean of its divisors is an integer number (100510006).

Almost surely, 2^201020011 is an apocalyptic number.

201020011 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020011 is an equidigital number, since it uses as much as digits as its factorization.

201020011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 201020011 is about 14178.1525947494. The cubic root of 201020011 is about 585.7960390488.

Adding to 201020011 its reverse (110020102), we get a palindrome (311040113).

Subtracting from 201020011 its reverse (110020102), we obtain a palindrome (90999909).

The spelling of 201020011 in words is "two hundred one million, twenty thousand, eleven".