2221201320121 has 16 divisors (see below), whose sum is σ = 2558004352000. Its totient is φ = 1889320921488.

The previous prime is 2221201320109. The next prime is 2221201320137. The reversal of 2221201320121 is 1210231021222.

It is not a de Polignac number, because 2221201320121 - 2⁵ = 2221201320089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2221201320721) 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 15 ways as a sum of consecutive naturals, for example, 1575675 + ... + 2631568.

It is an arithmetic number, because the mean of its divisors is an integer number (159875272000).

Almost surely, 2^{2221201320121} is an apocalyptic number.

It is an amenable number.

2221201320121 is a deficient number, since it is larger than the sum of its proper divisors (336803031879).

2221201320121 is a wasteful number, since it uses less digits than its factorization.

2221201320121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4207828.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 2221201320121 its reverse (1210231021222), we get a palindrome (3431432341343).

The spelling of 2221201320121 in words is "two trillion, two hundred twenty-one billion, two hundred one million, three hundred twenty thousand, one hundred twenty-one".