2221201022021 has 8 divisors (see below), whose sum is σ = 2224612200960. Its totient is φ = 2217791783152.

The previous prime is 2221201021973. The next prime is 2221201022023. The reversal of 2221201022021 is 1202201021222.

It is a happy number.

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 2221201022021 - 2⁶ = 2221201021957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221201022023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814915 + ... + 2781423.

It is an arithmetic number, because the mean of its divisors is an integer number (278076525120).

Almost surely, 2^{2221201022021} is an apocalyptic number.

It is an amenable number.

2221201022021 is a deficient number, since it is larger than the sum of its proper divisors (3411178939).

2221201022021 is an equidigital number, since it uses as much as digits as its factorization.

2221201022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970035.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 2221201022021 its reverse (1202201021222), we get a palindrome (3423402043243).

The spelling of 2221201022021 in words is "two trillion, two hundred twenty-one billion, two hundred one million, twenty-two thousand, twenty-one".