11122210011961 has 2 divisors, whose sum is σ = 11122210011962. Its totient is φ = 11122210011960.

The previous prime is 11122210011911. The next prime is 11122210011989. The reversal of 11122210011961 is 16911001222111.

It is an a-pointer prime, because the next prime (11122210011989) can be obtained adding 11122210011961 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9366850001961 + 1755360010000 = 3060531^2 + 1324900^2 .

It is a cyclic number.

It is not a de Polignac number, because 11122210011961 - 2¹³ = 11122210003769 is a prime.

It is not a weakly prime, because it can be changed into another prime (11122210011911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561105005980 + 5561105005981.

It is an arithmetic number, because the mean of its divisors is an integer number (5561105005981).

Almost surely, 2^{11122210011961} is an apocalyptic number.

It is an amenable number.

11122210011961 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122210011961 is an equidigital number, since it uses as much as digits as its factorization.

11122210011961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 28.

The spelling of 11122210011961 in words is "eleven trillion, one hundred twenty-two billion, two hundred ten million, eleven thousand, nine hundred sixty-one".