201020020111 has 2 divisors, whose sum is σ = 201020020112. Its totient is φ = 201020020110.

The previous prime is 201020020081. The next prime is 201020020133. The reversal of 201020020111 is 111020020102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201020020111 - 2¹⁹ = 201019495823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201020020151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510010055 + 100510010056.

It is an arithmetic number, because the mean of its divisors is an integer number (100510010056).

Almost surely, 2^201020020111 is an apocalyptic number.

201020020111 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020020111 is an equidigital number, since it uses as much as digits as its factorization.

201020020111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201020020111 its reverse (111020020102), we get a palindrome (312040040213).

Subtracting from 201020020111 its reverse (111020020102), we obtain a palindrome (90000000009).

The spelling of 201020020111 in words is "two hundred one billion, twenty million, twenty thousand, one hundred eleven".