221202221441 has 4 divisors (see below), whose sum is σ = 224232388932. Its totient is φ = 218172053952.

The previous prime is 221202221417. The next prime is 221202221507. The reversal of 221202221441 is 144122202122.

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 115233091600 + 105969129841 = 339460^2 + 325529^2 .

It is a cyclic number.

It is not a de Polignac number, because 221202221441 - 2⁶ = 221202221377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221202221411) 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, 1515083636 + ... + 1515083781.

It is an arithmetic number, because the mean of its divisors is an integer number (56058097233).

Almost surely, 2^221202221441 is an apocalyptic number.

It is an amenable number.

221202221441 is a deficient number, since it is larger than the sum of its proper divisors (3030167491).

221202221441 is an equidigital number, since it uses as much as digits as its factorization.

221202221441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030167490.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221202221441 its reverse (144122202122), we get a palindrome (365324423563).

The spelling of 221202221441 in words is "two hundred twenty-one billion, two hundred two million, two hundred twenty-one thousand, four hundred forty-one".