211105421999 has 2 divisors, whose sum is σ = 211105422000. Its totient is φ = 211105421998.

The previous prime is 211105421953. The next prime is 211105422041. The reversal of 211105421999 is 999124501112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211105421999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211105421599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105552710999 + 105552711000.

It is an arithmetic number, because the mean of its divisors is an integer number (105552711000).

Almost surely, 2^211105421999 is an apocalyptic number.

211105421999 is a deficient number, since it is larger than the sum of its proper divisors (1).

211105421999 is an equidigital number, since it uses as much as digits as its factorization.

211105421999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 44.

The spelling of 211105421999 in words is "two hundred eleven billion, one hundred five million, four hundred twenty-one thousand, nine hundred ninety-nine".