111211100000123 has 2 divisors, whose sum is σ = 111211100000124. Its totient is φ = 111211100000122.

The previous prime is 111211100000093. The next prime is 111211100000137. The reversal of 111211100000123 is 321000001112111.

It is an a-pointer prime, because the next prime (111211100000137) can be obtained adding 111211100000123 to its sum of digits (14).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111211100000123 - 2¹⁸ = 111211099737979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111211100000098 and 111211100000107.

It is not a weakly prime, because it can be changed into another prime (111211100000173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605550000061 + 55605550000062.

It is an arithmetic number, because the mean of its divisors is an integer number (55605550000062).

Almost surely, 2^{111211100000123} is an apocalyptic number.

111211100000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211100000123 is an equidigital number, since it uses as much as digits as its factorization.

111211100000123 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 14.

Adding to 111211100000123 its reverse (321000001112111), we get a palindrome (432211101112234).

The spelling of 111211100000123 in words is "one hundred eleven trillion, two hundred eleven billion, one hundred million, one hundred twenty-three", and thus it is an aban number.