1222212101161 has 2 divisors, whose sum is σ = 1222212101162. Its totient is φ = 1222212101160.

The previous prime is 1222212101081. The next prime is 1222212101189. The reversal of 1222212101161 is 1611012122221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 931765478400 + 290446622761 = 965280^2 + 538931^2 .

It is an emirp because it is prime and its reverse (1611012122221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222212101161 - 2¹⁵ = 1222212068393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1222212501161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611106050580 + 611106050581.

It is an arithmetic number, because the mean of its divisors is an integer number (611106050581).

Almost surely, 2^{1222212101161} is an apocalyptic number.

It is an amenable number.

1222212101161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222212101161 is an equidigital number, since it uses as much as digits as its factorization.

1222212101161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 22.

Adding to 1222212101161 its reverse (1611012122221), we get a palindrome (2833224223382).

The spelling of 1222212101161 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, one hundred one thousand, one hundred sixty-one".