21220000019 has 2 divisors, whose sum is σ = 21220000020. Its totient is φ = 21220000018.

The previous prime is 21220000001. The next prime is 21220000037. The reversal of 21220000019 is 91000002212.

It is a balanced prime because it is at equal distance from previous prime (21220000001) and next prime (21220000037).

It is a cyclic number.

It is not a de Polignac number, because 21220000019 - 2⁸ = 21219999763 is a prime.

It is a super-2 number, since 2×21220000019² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21219999961 and 21220000006.

It is not a weakly prime, because it can be changed into another prime (21220000079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610000009 + 10610000010.

It is an arithmetic number, because the mean of its divisors is an integer number (10610000010).

Almost surely, 2^21220000019 is an apocalyptic number.

21220000019 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220000019 is an equidigital number, since it uses as much as digits as its factorization.

21220000019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The spelling of 21220000019 in words is "twenty-one billion, two hundred twenty million, nineteen", and thus it is an aban number.