2221220444021 has 8 divisors (see below), whose sum is σ = 2349876168000. Its totient is φ = 2093739658560.

The previous prime is 2221220444011. The next prime is 2221220444033. The reversal of 2221220444021 is 1204440221222.

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 2221220444021 - 2²² = 2221216249717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221220444011) 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, 293730740 + ... + 293738301.

It is an arithmetic number, because the mean of its divisors is an integer number (293734521000).

Almost surely, 2^{2221220444021} is an apocalyptic number.

It is an amenable number.

2221220444021 is a deficient number, since it is larger than the sum of its proper divisors (128655723979).

2221220444021 is a wasteful number, since it uses less digits than its factorization.

2221220444021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587469259.

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 2221220444021 its reverse (1204440221222), we get a palindrome (3425660665243).

The spelling of 2221220444021 in words is "two trillion, two hundred twenty-one billion, two hundred twenty million, four hundred forty-four thousand, twenty-one".