201020122111 has 2 divisors, whose sum is σ = 201020122112. Its totient is φ = 201020122110.

The previous prime is 201020122091. The next prime is 201020122117. The reversal of 201020122111 is 111221020102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201020122111 - 2²¹ = 201018024959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201020122091 and 201020122100.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201020122117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510061055 + 100510061056.

It is an arithmetic number, because the mean of its divisors is an integer number (100510061056).

Almost surely, 2^201020122111 is an apocalyptic number.

201020122111 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020122111 is an equidigital number, since it uses as much as digits as its factorization.

201020122111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201020122111 its reverse (111221020102), we get a palindrome (312241142213).

The spelling of 201020122111 in words is "two hundred one billion, twenty million, one hundred twenty-two thousand, one hundred eleven".