11221322129 has 2 divisors, whose sum is σ = 11221322130. Its totient is φ = 11221322128.

The previous prime is 11221322113. The next prime is 11221322137. The reversal of 11221322129 is 92122312211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11137636225 + 83685904 = 105535^2 + 9148^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221322129 - 2⁴ = 11221322113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221322098 and 11221322107.

It is not a weakly prime, because it can be changed into another prime (11221324129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610661064 + 5610661065.

It is an arithmetic number, because the mean of its divisors is an integer number (5610661065).

Almost surely, 2^11221322129 is an apocalyptic number.

It is an amenable number.

11221322129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221322129 is an equidigital number, since it uses as much as digits as its factorization.

11221322129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The spelling of 11221322129 in words is "eleven billion, two hundred twenty-one million, three hundred twenty-two thousand, one hundred twenty-nine".