21075100219 has 12 divisors (see below), whose sum is σ = 22547418456. Its totient is φ = 19692354528.

The previous prime is 21075100183. The next prime is 21075100223. The reversal of 21075100219 is 91200157012.

It is not a de Polignac number, because 21075100219 - 2⁷ = 21075100091 is a prime.

It is a super-2 number, since 2×21075100219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21075100229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 373509 + ... + 426214.

It is an arithmetic number, because the mean of its divisors is an integer number (1878951538).

Almost surely, 2^21075100219 is an apocalyptic number.

21075100219 is a deficient number, since it is larger than the sum of its proper divisors (1472318237).

21075100219 is an equidigital number, since it uses as much as digits as its factorization.

21075100219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799834 (or 799815 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 28.

The spelling of 21075100219 in words is "twenty-one billion, seventy-five million, one hundred thousand, two hundred nineteen".