211122212821999 has 2 divisors, whose sum is σ = 211122212822000. Its totient is φ = 211122212821998.

The previous prime is 211122212821979. The next prime is 211122212822041. The reversal of 211122212821999 is 999128212221112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211122212821999 - 2⁵ = 211122212821967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211122212821979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105561106410999 + 105561106411000.

It is an arithmetic number, because the mean of its divisors is an integer number (105561106411000).

Almost surely, 2^{211122212821999} is an apocalyptic number.

211122212821999 is a deficient number, since it is larger than the sum of its proper divisors (1).

211122212821999 is an equidigital number, since it uses as much as digits as its factorization.

211122212821999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 52.

The spelling of 211122212821999 in words is "two hundred eleven trillion, one hundred twenty-two billion, two hundred twelve million, eight hundred twenty-one thousand, nine hundred ninety-nine".