21203230219 has 2 divisors, whose sum is σ = 21203230220. Its totient is φ = 21203230218.

The previous prime is 21203230187. The next prime is 21203230231. The reversal of 21203230219 is 91203230212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21203230219 - 2⁵ = 21203230187 is a prime.

It is a super-2 number, since 2×21203230219² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21203230193 and 21203230202.

It is not a weakly prime, because it can be changed into another prime (21203230019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601615109 + 10601615110.

It is an arithmetic number, because the mean of its divisors is an integer number (10601615110).

Almost surely, 2^21203230219 is an apocalyptic number.

21203230219 is a deficient number, since it is larger than the sum of its proper divisors (1).

21203230219 is an equidigital number, since it uses as much as digits as its factorization.

21203230219 is an evil number, because the sum of its binary digits is even.

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

The spelling of 21203230219 in words is "twenty-one billion, two hundred three million, two hundred thirty thousand, two hundred nineteen".