1212122120999 has 2 divisors, whose sum is σ = 1212122121000. Its totient is φ = 1212122120998.

The previous prime is 1212122120983. The next prime is 1212122121013. The reversal of 1212122120999 is 9990212212121.

It is a strong prime.

It is an emirp because it is prime and its reverse (9990212212121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212122120999 - 2⁴ = 1212122120983 is a prime.

It is a super-2 number, since 2×1212122120999² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212122120969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606061060499 + 606061060500.

It is an arithmetic number, because the mean of its divisors is an integer number (606061060500).

Almost surely, 2^{1212122120999} is an apocalyptic number.

1212122120999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212122120999 is an equidigital number, since it uses as much as digits as its factorization.

1212122120999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 41.

The spelling of 1212122120999 in words is "one trillion, two hundred twelve billion, one hundred twenty-two million, one hundred twenty thousand, nine hundred ninety-nine".