1121211121999 has 2 divisors, whose sum is σ = 1121211122000. Its totient is φ = 1121211121998.

The previous prime is 1121211121931. The next prime is 1121211122027. The reversal of 1121211121999 is 9991211121211.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1121211121999 - 2⁷ = 1121211121871 is a prime.

It is a super-2 number, since 2×1121211121999² (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 (1121211121909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560605560999 + 560605561000.

It is an arithmetic number, because the mean of its divisors is an integer number (560605561000).

Almost surely, 2^{1121211121999} is an apocalyptic number.

1121211121999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121211121999 is an equidigital number, since it uses as much as digits as its factorization.

1121211121999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 40.

The spelling of 1121211121999 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand, nine hundred ninety-nine".