21200120219 has 4 divisors (see below), whose sum is σ = 22315916040. Its totient is φ = 20084324400.

The previous prime is 21200120213. The next prime is 21200120237. The reversal of 21200120219 is 91202100212.

It is a happy number.

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 21200120219 - 2⁴ = 21200120203 is a prime.

It is a super-2 number, since 2×21200120219² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21200120219.

It is not an unprimeable number, because it can be changed into a prime (21200120213) 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, 557897882 + ... + 557897919.

It is an arithmetic number, because the mean of its divisors is an integer number (5578979010).

Almost surely, 2^21200120219 is an apocalyptic number.

21200120219 is a deficient number, since it is larger than the sum of its proper divisors (1115795821).

21200120219 is a wasteful number, since it uses less digits than its factorization.

21200120219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115795820.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 21200120219 in words is "twenty-one billion, two hundred million, one hundred twenty thousand, two hundred nineteen".