222201221220021 has 8 divisors (see below), whose sum is σ = 296476494751360. Its totient is φ = 148030047584352.

The previous prime is 222201221219983. The next prime is 222201221220029. The reversal of 222201221220021 is 120022122102222.

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

It is not a de Polignac number, because 222201221220021 - 2²⁹ = 222200684349109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222201221220021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222201221220029) 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, 26024968936 + ... + 26024977473.

It is an arithmetic number, because the mean of its divisors is an integer number (37059561843920).

Almost surely, 2^{222201221220021} is an apocalyptic number.

It is an amenable number.

222201221220021 is a deficient number, since it is larger than the sum of its proper divisors (74275273531339).

222201221220021 is a wasteful number, since it uses less digits than its factorization.

222201221220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52049947835.

The product of its (nonzero) digits is 512, while the sum is 21.

Adding to 222201221220021 its reverse (120022122102222), we get a palindrome (342223343322243).

The spelling of 222201221220021 in words is "two hundred twenty-two trillion, two hundred one billion, two hundred twenty-one million, two hundred twenty thousand, twenty-one".