11221221022129 has 2 divisors, whose sum is σ = 11221221022130. Its totient is φ = 11221221022128.

The previous prime is 11221221022021. The next prime is 11221221022177. The reversal of 11221221022129 is 92122012212211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10934297957025 + 286923065104 = 3306705^2 + 535652^2 .

It is a cyclic number.

It is not a de Polignac number, because 11221221022129 - 2¹¹ = 11221221020081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11221221022097 and 11221221022106.

It is not a weakly prime, because it can be changed into another prime (11221221026129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5610610511064 + 5610610511065.

It is an arithmetic number, because the mean of its divisors is an integer number (5610610511065).

Almost surely, 2^{11221221022129} is an apocalyptic number.

It is an amenable number.

11221221022129 is a deficient number, since it is larger than the sum of its proper divisors (1).

11221221022129 is an equidigital number, since it uses as much as digits as its factorization.

11221221022129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 28.

The spelling of 11221221022129 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-nine".