21204103219 has 4 divisors (see below), whose sum is σ = 22835188096. Its totient is φ = 19573018344.

The previous prime is 21204103187. The next prime is 21204103231. The reversal of 21204103219 is 91230140212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21204103219 - 2⁵ = 21204103187 is a prime.

It is a super-2 number, since 2×21204103219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21204103193 and 21204103202.

It is not an unprimeable number, because it can be changed into a prime (21204104219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815542419 + ... + 815542444.

It is an arithmetic number, because the mean of its divisors is an integer number (5708797024).

Almost surely, 2^21204103219 is an apocalyptic number.

21204103219 is a deficient number, since it is larger than the sum of its proper divisors (1631084877).

21204103219 is a wasteful number, since it uses less digits than its factorization.

21204103219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631084876.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 21204103219 in words is "twenty-one billion, two hundred four million, one hundred three thousand, two hundred nineteen".