11420228716621 has 2 divisors, whose sum is σ = 11420228716622. Its totient is φ = 11420228716620.

The previous prime is 11420228716601. The next prime is 11420228716711. The reversal of 11420228716621 is 12661782202411.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6481678095396 + 4938550621225 = 2545914^2 + 2222285^2 .

It is an emirp because it is prime and its reverse (12661782202411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11420228716621 - 2⁹ = 11420228716109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11420228716601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710114358310 + 5710114358311.

It is an arithmetic number, because the mean of its divisors is an integer number (5710114358311).

Almost surely, 2^{11420228716621} is an apocalyptic number.

It is an amenable number.

11420228716621 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420228716621 is an equidigital number, since it uses as much as digits as its factorization.

11420228716621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 43.

The spelling of 11420228716621 in words is "eleven trillion, four hundred twenty billion, two hundred twenty-eight million, seven hundred sixteen thousand, six hundred twenty-one".