111111122021023 has 2 divisors, whose sum is σ = 111111122021024. Its totient is φ = 111111122021022.

The previous prime is 111111122020937. The next prime is 111111122021057. The reversal of 111111122021023 is 320120221111111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111111122021023 - 2⁹ = 111111122020511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111111122021093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55555561010511 + 55555561010512.

It is an arithmetic number, because the mean of its divisors is an integer number (55555561010512).

Almost surely, 2^{111111122021023} is an apocalyptic number.

111111122021023 is a deficient number, since it is larger than the sum of its proper divisors (1).

111111122021023 is an equidigital number, since it uses as much as digits as its factorization.

111111122021023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 19.

Adding to 111111122021023 its reverse (320120221111111), we get a palindrome (431231343132134).

The spelling of 111111122021023 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-two million, twenty-one thousand, twenty-three".