12111211010999 has 2 divisors, whose sum is σ = 12111211011000. Its totient is φ = 12111211010998.

The previous prime is 12111211010891. The next prime is 12111211011001. The reversal of 12111211010999 is 99901011211121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12111211010999 - 2¹² = 12111211006903 is a prime.

Together with 12111211011001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111211030999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055605505499 + 6055605505500.

It is an arithmetic number, because the mean of its divisors is an integer number (6055605505500).

Almost surely, 2^{12111211010999} is an apocalyptic number.

12111211010999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111211010999 is an equidigital number, since it uses as much as digits as its factorization.

12111211010999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 38.

The spelling of 12111211010999 in words is "twelve trillion, one hundred eleven billion, two hundred eleven million, ten thousand, nine hundred ninety-nine".