1222221022129 has 2 divisors, whose sum is σ = 1222221022130. Its totient is φ = 1222221022128.

The previous prime is 1222221022091. The next prime is 1222221022193. The reversal of 1222221022129 is 9212201222221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 869565575025 + 352655447104 = 932505^2 + 593848^2 .

It is an emirp because it is prime and its reverse (9212201222221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222221022129 - 2¹⁵ = 1222220989361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1222221022097 and 1222221022106.

It is not a weakly prime, because it can be changed into another prime (1222221026129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611110511064 + 611110511065.

It is an arithmetic number, because the mean of its divisors is an integer number (611110511065).

Almost surely, 2^{1222221022129} is an apocalyptic number.

It is an amenable number.

1222221022129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222221022129 is an equidigital number, since it uses as much as digits as its factorization.

1222221022129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 28.

The spelling of 1222221022129 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, twenty-two thousand, one hundred twenty-nine".