111211201121023 has 2 divisors, whose sum is σ = 111211201121024. Its totient is φ = 111211201121022.

The previous prime is 111211201120993. The next prime is 111211201121159. The reversal of 111211201121023 is 320121102112111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111211201121023 - 2³⁷ = 111073762167551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111211201128023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605600560511 + 55605600560512.

It is an arithmetic number, because the mean of its divisors is an integer number (55605600560512).

Almost surely, 2^{111211201121023} is an apocalyptic number.

111211201121023 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211201121023 is an equidigital number, since it uses as much as digits as its factorization.

111211201121023 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 111211201121023 its reverse (320121102112111), we get a palindrome (431332303233134).

The spelling of 111211201121023 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred one million, one hundred twenty-one thousand, twenty-three".