21212110219999 has 2 divisors, whose sum is σ = 21212110220000. Its totient is φ = 21212110219998.

The previous prime is 21212110219931. The next prime is 21212110220047. The reversal of 21212110219999 is 99991201121212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21212110219999 is a prime.

It is a super-3 number, since 3×21212110219999³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21212110279999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10606055109999 + 10606055110000.

It is an arithmetic number, because the mean of its divisors is an integer number (10606055110000).

Almost surely, 2^{21212110219999} is an apocalyptic number.

21212110219999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21212110219999 is an equidigital number, since it uses as much as digits as its factorization.

21212110219999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 49.

The spelling of 21212110219999 in words is "twenty-one trillion, two hundred twelve billion, one hundred ten million, two hundred nineteen thousand, nine hundred ninety-nine".