221212324100441 has 4 divisors (see below), whose sum is σ = 221967314967972. Its totient is φ = 220457333232912.

The previous prime is 221212324100419. The next prime is 221212324100479. The reversal of 221212324100441 is 144001423212122.

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 191344142598400 + 29868181502041 = 13832720^2 + 5465179^2 .

It is a cyclic number.

It is not a de Polignac number, because 221212324100441 - 2¹⁴ = 221212324084057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221212324100041) 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, 377495433326 + ... + 377495433911.

It is an arithmetic number, because the mean of its divisors is an integer number (55491828741993).

Almost surely, 2^{221212324100441} is an apocalyptic number.

It is an amenable number.

221212324100441 is a deficient number, since it is larger than the sum of its proper divisors (754990867531).

221212324100441 is an equidigital number, since it uses as much as digits as its factorization.

221212324100441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 754990867530.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 221212324100441 its reverse (144001423212122), we get a palindrome (365213747312563).

The spelling of 221212324100441 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred twenty-four million, one hundred thousand, four hundred forty-one".