11221210020161 has 2 divisors, whose sum is σ = 11221210020162. Its totient is φ = 11221210020160.

The previous prime is 11221210020113. The next prime is 11221210020277. The reversal of 11221210020161 is 16102001212211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7020083407936 + 4201126612225 = 2649544^2 + 2049665^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221210020161 - 2¹⁰ = 11221210019137 is a prime.

It is not a weakly prime, because it can be changed into another prime (11221210020661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610605010080 + 5610605010081.

It is an arithmetic number, because the mean of its divisors is an integer number (5610605010081).

Almost surely, 2^{11221210020161} is an apocalyptic number.

It is an amenable number.

11221210020161 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221210020161 is an equidigital number, since it uses as much as digits as its factorization.

11221210020161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 20.

Adding to 11221210020161 its reverse (16102001212211), we get a palindrome (27323211232372).

The spelling of 11221210020161 in words is "eleven trillion, two hundred twenty-one billion, two hundred ten million, twenty thousand, one hundred sixty-one".