21100000219 has 2 divisors, whose sum is σ = 21100000220. Its totient is φ = 21100000218.

The previous prime is 21100000157. The next prime is 21100000241. The reversal of 21100000219 is 91200000112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21100000219 - 2⁹ = 21099999707 is a prime.

It is a super-2 number, since 2×21100000219² (a number of 21 digits) contains 22 as substring.

21100000219 is a modest number, since divided by 219 gives 211 as remainder.

It is not a weakly prime, because it can be changed into another prime (21100006219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550000109 + 10550000110.

It is an arithmetic number, because the mean of its divisors is an integer number (10550000110).

Almost surely, 2^21100000219 is an apocalyptic number.

21100000219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100000219 is an equidigital number, since it uses as much as digits as its factorization.

21100000219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

The spelling of 21100000219 in words is "twenty-one billion, one hundred million, two hundred nineteen", and thus it is an aban number.