221204556236341 has 4 divisors (see below), whose sum is σ = 221211801985900. Its totient is φ = 221197310486784.

The previous prime is 221204556236269. The next prime is 221204556236351. The reversal of 221204556236341 is 143632655402122.

It is a happy number.

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 98417014686225 + 122787541550116 = 9920535^2 + 11080954^2 .

It is a cyclic number.

It is not a de Polignac number, because 221204556236341 - 2⁹ = 221204556235829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221204556236291 and 221204556236300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221204556236351) 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, 3622828986 + ... + 3622890043.

It is an arithmetic number, because the mean of its divisors is an integer number (55302950496475).

Almost surely, 2^{221204556236341} is an apocalyptic number.

It is an amenable number.

221204556236341 is a deficient number, since it is larger than the sum of its proper divisors (7245749559).

221204556236341 is an equidigital number, since it uses as much as digits as its factorization.

221204556236341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7245749558.

The product of its (nonzero) digits is 2073600, while the sum is 46.

The spelling of 221204556236341 in words is "two hundred twenty-one trillion, two hundred four billion, five hundred fifty-six million, two hundred thirty-six thousand, three hundred forty-one".