201221220219 has 16 divisors (see below), whose sum is σ = 272735489664. Its totient is φ = 131945340800.

The previous prime is 201221220191. The next prime is 201221220253. The reversal of 201221220219 is 912022122102.

It is a cyclic number.

It is not a de Polignac number, because 201221220219 - 2²⁰ = 201220171643 is a prime.

It is a super-2 number, since 2×201221220219² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201221220719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2221137 + ... + 2309954.

It is an arithmetic number, because the mean of its divisors is an integer number (17045968104).

Almost surely, 2^201221220219 is an apocalyptic number.

201221220219 is a deficient number, since it is larger than the sum of its proper divisors (71514269445).

201221220219 is a wasteful number, since it uses less digits than its factorization.

201221220219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4531338.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 201221220219 in words is "two hundred one billion, two hundred twenty-one million, two hundred twenty thousand, two hundred nineteen".