2221120120021 has 8 divisors (see below), whose sum is σ = 2440472076000. Its totient is φ = 2004673488240.

The previous prime is 2221120119947. The next prime is 2221120120049. The reversal of 2221120120021 is 1200210211222.

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 2221120120021 - 2¹¹ = 2221120117973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2221120119977 and 2221120120004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221120120091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726329446 + ... + 726332503.

It is an arithmetic number, because the mean of its divisors is an integer number (305059009500).

Almost surely, 2^{2221120120021} is an apocalyptic number.

It is an amenable number.

2221120120021 is a deficient number, since it is larger than the sum of its proper divisors (219351955979).

2221120120021 is a wasteful number, since it uses less digits than its factorization.

2221120120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452662099.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2221120120021 its reverse (1200210211222), we get a palindrome (3421330331243).

The spelling of 2221120120021 in words is "two trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, twenty-one".