111110121211993 has 2 divisors, whose sum is σ = 111110121211994. Its totient is φ = 111110121211992.

The previous prime is 111110121211939. The next prime is 111110121212009. The reversal of 111110121211993 is 399112121011111.

It is a happy number.

Together with previous prime (111110121211939) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63622765526544 + 47487355685449 = 7976388^2 + 6891107^2 .

It is a cyclic number.

It is not a de Polignac number, because 111110121211993 - 2²⁵ = 111110087657561 is a prime.

It is not a weakly prime, because it can be changed into another prime (111110121281993) 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, 55555060605996 + 55555060605997.

It is an arithmetic number, because the mean of its divisors is an integer number (55555060605997).

Almost surely, 2^{111110121211993} is an apocalyptic number.

It is an amenable number.

111110121211993 is a deficient number, since it is larger than the sum of its proper divisors (1).

111110121211993 is an equidigital number, since it uses as much as digits as its factorization.

111110121211993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 34.

The spelling of 111110121211993 in words is "one hundred eleven trillion, one hundred ten billion, one hundred twenty-one million, two hundred eleven thousand, nine hundred ninety-three".