21113030285819 has 2 divisors, whose sum is σ = 21113030285820. Its totient is φ = 21113030285818.

The previous prime is 21113030285791. The next prime is 21113030285857. The reversal of 21113030285819 is 91858203031112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21113030285819 is a prime.

It is a super-2 number, since 2×21113030285819² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21113030285819.

It is not a weakly prime, because it can be changed into another prime (21113030282819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556515142909 + 10556515142910.

It is an arithmetic number, because the mean of its divisors is an integer number (10556515142910).

Almost surely, 2^{21113030285819} is an apocalyptic number.

21113030285819 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113030285819 is an equidigital number, since it uses as much as digits as its factorization.

21113030285819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 44.

The spelling of 21113030285819 in words is "twenty-one trillion, one hundred thirteen billion, thirty million, two hundred eighty-five thousand, eight hundred nineteen".