111210122111999 has 2 divisors, whose sum is σ = 111210122112000. Its totient is φ = 111210122111998.

The previous prime is 111210122111917. The next prime is 111210122112017. The reversal of 111210122111999 is 999111221012111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111210122111999 - 2²⁸ = 111209853676543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111210122111899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605061055999 + 55605061056000.

It is an arithmetic number, because the mean of its divisors is an integer number (55605061056000).

Almost surely, 2^{111210122111999} is an apocalyptic number.

111210122111999 is a deficient number, since it is larger than the sum of its proper divisors (1).

111210122111999 is an equidigital number, since it uses as much as digits as its factorization.

111210122111999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 41.

The spelling of 111210122111999 in words is "one hundred eleven trillion, two hundred ten billion, one hundred twenty-two million, one hundred eleven thousand, nine hundred ninety-nine".