1222221031211 has 2 divisors, whose sum is σ = 1222221031212. Its totient is φ = 1222221031210.

The previous prime is 1222221031193. The next prime is 1222221031217. The reversal of 1222221031211 is 1121301222221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1222221031211 - 2¹⁸ = 1222220769067 is a prime.

It is a super-2 number, since 2×1222221031211² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1222221031217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611110515605 + 611110515606.

It is an arithmetic number, because the mean of its divisors is an integer number (611110515606).

Almost surely, 2^{1222221031211} is an apocalyptic number.

1222221031211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222221031211 is an equidigital number, since it uses as much as digits as its factorization.

1222221031211 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 20.

Adding to 1222221031211 its reverse (1121301222221), we get a palindrome (2343522253432).

The spelling of 1222221031211 in words is "one trillion, two hundred twenty-two billion, two hundred twenty-one million, thirty-one thousand, two hundred eleven".