201111023 has 2 divisors, whose sum is σ = 201111024. Its totient is φ = 201111022.

The previous prime is 201111017. The next prime is 201111047. The reversal of 201111023 is 320111102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201111023 - 2⁴ = 201111007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201110995 and 201111013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201111013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100555511 + 100555512.

It is an arithmetic number, because the mean of its divisors is an integer number (100555512).

Almost surely, 2^201111023 is an apocalyptic number.

201111023 is a deficient number, since it is larger than the sum of its proper divisors (1).

201111023 is an equidigital number, since it uses as much as digits as its factorization.

201111023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 201111023 is about 14181.3618175407. The cubic root of 201111023 is about 585.8844322802.

Adding to 201111023 its reverse (320111102), we get a palindrome (521222125).

It can be divided in two parts, 20111102 and 3, that multiplied together give a palindrome (60333306).

The spelling of 201111023 in words is "two hundred one million, one hundred eleven thousand, twenty-three".