221011223431441 has 4 divisors (see below), whose sum is σ = 221105632328884. Its totient is φ = 220916814534000.

The previous prime is 221011223431351. The next prime is 221011223431541. The reversal of 221011223431441 is 144134322110122.

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 135682403661841 + 85328819769600 = 11648279^2 + 9237360^2 .

It is a cyclic number.

It is not a de Polignac number, because 221011223431441 - 2³³ = 221002633496849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221011223431541) 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, 47204445210 + ... + 47204449891.

It is an arithmetic number, because the mean of its divisors is an integer number (55276408082221).

Almost surely, 2^{221011223431441} is an apocalyptic number.

It is an amenable number.

221011223431441 is a deficient number, since it is larger than the sum of its proper divisors (94408897443).

221011223431441 is an equidigital number, since it uses as much as digits as its factorization.

221011223431441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94408897442.

The product of its (nonzero) digits is 9216, while the sum is 31.

Adding to 221011223431441 its reverse (144134322110122), we get a palindrome (365145545541563).

The spelling of 221011223431441 in words is "two hundred twenty-one trillion, eleven billion, two hundred twenty-three million, four hundred thirty-one thousand, four hundred forty-one".