21223230019 has 2 divisors, whose sum is σ = 21223230020. Its totient is φ = 21223230018.

The previous prime is 21223230001. The next prime is 21223230053. The reversal of 21223230019 is 91003232212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21223230019 - 2⁷ = 21223229891 is a prime.

It is a super-2 number, since 2×21223230019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21223229975 and 21223230002.

It is not a weakly prime, because it can be changed into another prime (21223231019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611615009 + 10611615010.

It is an arithmetic number, because the mean of its divisors is an integer number (10611615010).

Almost surely, 2^21223230019 is an apocalyptic number.

21223230019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21223230019 is an equidigital number, since it uses as much as digits as its factorization.

21223230019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 21223230019 in words is "twenty-one billion, two hundred twenty-three million, two hundred thirty thousand, nineteen".