2241663085621 has 2 divisors, whose sum is σ = 2241663085622. Its totient is φ = 2241663085620.

The previous prime is 2241663085619. The next prime is 2241663085631. The reversal of 2241663085621 is 1265803661422.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2120186439396 + 121476646225 = 1456086^2 + 348535^2 .

It is a cyclic number.

It is not a de Polignac number, because 2241663085621 - 2¹ = 2241663085619 is a prime.

Together with 2241663085619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2241663085631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1120831542810 + 1120831542811.

It is an arithmetic number, because the mean of its divisors is an integer number (1120831542811).

Almost surely, 2^{2241663085621} is an apocalyptic number.

It is an amenable number.

2241663085621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2241663085621 is an equidigital number, since it uses as much as digits as its factorization.

2241663085621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 2241663085621 in words is "two trillion, two hundred forty-one billion, six hundred sixty-three million, eighty-five thousand, six hundred twenty-one".