21000202219 has 8 divisors (see below), whose sum is σ = 22408292240. Its totient is φ = 19622393856.

The previous prime is 21000202213. The next prime is 21000202241. The reversal of 21000202219 is 91220200012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21000202219 - 2⁹ = 21000201707 is a prime.

It is a super-2 number, since 2×21000202219² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000202196 and 21000202205.

It is not an unprimeable number, because it can be changed into a prime (21000202213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7568982 + ... + 7571755.

It is an arithmetic number, because the mean of its divisors is an integer number (2801036530).

Almost surely, 2^21000202219 is an apocalyptic number.

21000202219 is a deficient number, since it is larger than the sum of its proper divisors (1408090021).

21000202219 is a wasteful number, since it uses less digits than its factorization.

21000202219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15140829.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 21000202219 in words is "twenty-one billion, two hundred two thousand, two hundred nineteen".