21120310219 has 2 divisors, whose sum is σ = 21120310220. Its totient is φ = 21120310218.

The previous prime is 21120310217. The next prime is 21120310223. The reversal of 21120310219 is 91201302112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21120310219 - 2¹ = 21120310217 is a prime.

It is a super-2 number, since 2×21120310219² (a number of 21 digits) contains 22 as substring.

Together with 21120310217, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21120310219.

It is not a weakly prime, because it can be changed into another prime (21120310217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10560155109 + 10560155110.

It is an arithmetic number, because the mean of its divisors is an integer number (10560155110).

Almost surely, 2^21120310219 is an apocalyptic number.

21120310219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21120310219 is an equidigital number, since it uses as much as digits as its factorization.

21120310219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The spelling of 21120310219 in words is "twenty-one billion, one hundred twenty million, three hundred ten thousand, two hundred nineteen".