21001220110219 has 8 divisors (see below), whose sum is σ = 21070457024400. Its totient is φ = 20932083035136.

The previous prime is 21001220110201. The next prime is 21001220110231. The reversal of 21001220110219 is 91201102210012.

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 21001220110219 - 2¹¹ = 21001220108171 is a prime.

It is a super-2 number, since 2×21001220110219² (a number of 27 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 21001220110219.

It is not an unprimeable number, because it can be changed into a prime (21001220110919) 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, 24538369 + ... + 25379794.

It is an arithmetic number, because the mean of its divisors is an integer number (2633807128050).

Almost surely, 2^{21001220110219} is an apocalyptic number.

21001220110219 is a deficient number, since it is larger than the sum of its proper divisors (69236914181).

21001220110219 is an equidigital number, since it uses as much as digits as its factorization.

21001220110219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49919549.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 21001220110219 in words is "twenty-one trillion, one billion, two hundred twenty million, one hundred ten thousand, two hundred nineteen".