12011211221029 has 2 divisors, whose sum is σ = 12011211221030. Its totient is φ = 12011211221028.

The previous prime is 12011211221011. The next prime is 12011211221099. The reversal of 12011211221029 is 92012211211021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10308421112929 + 1702790108100 = 3210673^2 + 1304910^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011211221029 - 2¹³ = 12011211212837 is a prime.

It is a super-2 number, since 2×12011211221029² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12011211220994 and 12011211221012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12011211221099) 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, 6005605610514 + 6005605610515.

It is an arithmetic number, because the mean of its divisors is an integer number (6005605610515).

Almost surely, 2^{12011211221029} is an apocalyptic number.

It is an amenable number.

12011211221029 is a deficient number, since it is larger than the sum of its proper divisors (1).

12011211221029 is an equidigital number, since it uses as much as digits as its factorization.

12011211221029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 12011211221029 in words is "twelve trillion, eleven billion, two hundred eleven million, two hundred twenty-one thousand, twenty-nine".