2221434341221 has 4 divisors (see below), whose sum is σ = 2228531575852. Its totient is φ = 2214337106592.

The previous prime is 2221434341179. The next prime is 2221434341227. The reversal of 2221434341221 is 1221434341222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 451241345025 + 1770192996196 = 671745^2 + 1330486^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221434341221 - 2¹³ = 2221434333029 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 (2221434341227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3548616846 + ... + 3548617471.

It is an arithmetic number, because the mean of its divisors is an integer number (557132893963).

Almost surely, 2^{2221434341221} is an apocalyptic number.

It is an amenable number.

2221434341221 is a deficient number, since it is larger than the sum of its proper divisors (7097234631).

2221434341221 is an equidigital number, since it uses as much as digits as its factorization.

2221434341221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7097234630.

The product of its digits is 18432, while the sum is 31.

Adding to 2221434341221 its reverse (1221434341222), we get a palindrome (3442868682443).

Subtracting from 2221434341221 its reverse (1221434341222), we obtain a palindrome (999999999999).

The spelling of 2221434341221 in words is "two trillion, two hundred twenty-one billion, four hundred thirty-four million, three hundred forty-one thousand, two hundred twenty-one".