111221022021229 has 2 divisors, whose sum is σ = 111221022021230. Its totient is φ = 111221022021228.

The previous prime is 111221022021211. The next prime is 111221022021401. The reversal of 111221022021229 is 922120220122111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98755695008100 + 12465327013129 = 9937590^2 + 3530627^2 .

It is an emirp because it is prime and its reverse (922120220122111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111221022021229 - 2³⁷ = 111083583067757 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111221022021197 and 111221022021206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111221022027229) 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, 55610511010614 + 55610511010615.

It is an arithmetic number, because the mean of its divisors is an integer number (55610511010615).

Almost surely, 2^{111221022021229} is an apocalyptic number.

It is an amenable number.

111221022021229 is a deficient number, since it is larger than the sum of its proper divisors (1).

111221022021229 is an equidigital number, since it uses as much as digits as its factorization.

111221022021229 is an odious number, because the sum of its binary digits is odd.

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

The spelling of 111221022021229 in words is "one hundred eleven trillion, two hundred twenty-one billion, twenty-two million, twenty-one thousand, two hundred twenty-nine".