21108802219 has 2 divisors, whose sum is σ = 21108802220. Its totient is φ = 21108802218.

The previous prime is 21108802163. The next prime is 21108802223. The reversal of 21108802219 is 91220880112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21108802219 - 2¹¹ = 21108800171 is a prime.

It is a super-2 number, since 2×21108802219² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21108802289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10554401109 + 10554401110.

It is an arithmetic number, because the mean of its divisors is an integer number (10554401110).

Almost surely, 2^21108802219 is an apocalyptic number.

21108802219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21108802219 is an equidigital number, since it uses as much as digits as its factorization.

21108802219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 34.

The spelling of 21108802219 in words is "twenty-one billion, one hundred eight million, eight hundred two thousand, two hundred nineteen".